Does sweep2wake affect the lifespan of the touchscreen panel? - Nexus 4 Q&A, Help & Troubleshooting

Out of curiosity, does the continued and prolonged use of sweep2wake shorten the lifespan or damage the touchscreen panel? I have no knowledge in electrical circuitry and I'm wondering if anyone with knowledge on these panels can comment as to whether these touchscreen sensors were designed to be running 24/7 with no negative consequences.
Secondly, does the continued use of the same region, in this case, sweep2wake's bottom row, also affect the sensitivity /functionality of the region over time?

PoisonWolf said:
Out of curiosity, does the continued and prolonged use of sweep2wake shorten the lifespan or damage the touchscreen panel? I have no knowledge in electrical circuitry and I'm wondering if anyone with knowledge on these panels can comment as to whether these touchscreen sensors were designed to be running 24/7 with no negative consequences.
Secondly, does the continued use of the same region, in this case, sweep2wake's bottom row, also affect the sensitivity /functionality of the region over time?
Click to expand...
Click to collapse
Of course swiping will wear on the panel. Friction causes physical wear. However, other components in your phone will wear out much more quickly so it's a moot point.
Sent from my SGH-T999 using Tapatalk 2

on my GN i used PGM Nexus and had no problems. i wouldnt worry about it.

Doesn't the digitizer lie under the LCD? So wouldn't wear be directed onto that? I guess that doesn't answer the question of it constantly running.
Sent from my Nexus 4 using Tapatalk 2

joshnichols189 said:
Doesn't the digitizer lie under the LCD? So wouldn't wear be directed onto that? I guess that doesn't answer the question of it constantly running.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
That is what I am curious about, whether the digitizer is meant to be running 24/7 and how these things are tested in factory conditions.

keep in mind that with the N4, the screen display and digitizer are basically glued together so if one goes bad, you're replacing both. I wouldn't risk it for a minor convenience modification that takes away battery performance and other unknown possiblities.

it will "wear out" after time.
in your device's lifespan?
no. absolutely not.

Related

Motorola response to multi-touch bug

QUOTE:
The 30 second threshold is actually something built in to aid in detection of moisture on the screen and normalize the touch plane (like shaking an Etch A Sketch). The algorithm is this case assumes a finger that is on one spot for an extended period of time is actually a drop of water. If the finger is removed from the screen, touch should become usable again in a second or two in that spot. The touch driver would then detect essentially a "negative touch" in the area where the finger was removed and do a screen calibration (shake the Etch A Sketch again). We are looking into what can be done to increase this time threshold for you gamers and still provide a good water immunity experience. The tradeoff would be if your phone screen gets wet (rain or mist), the touch on the screen would become basically unusable. Stay tuned to this thread for updates.
It does make sense when you think about it.
Whenever I hear stuff like this I get a little bit disappointed. What ever happened to being able to ENABLE/DISABLE features like this? Wouldn't that make a hell of a lot more sense then trying to increase the threshold time?
cafe. said:
Whenever I hear stuff like this I get a little bit disappointed. What ever happened to being able to ENABLE/DISABLE features like this? Wouldn't that make a hell of a lot more sense then trying to increase the threshold time?
Click to expand...
Click to collapse
Man I wish everyone would think like you.
Hopefully they will add an enable/disable button and be done with it.
Sent from my MB860 using XDA App
cafe. said:
Whenever I hear stuff like this I get a little bit disappointed. What ever happened to being able to ENABLE/DISABLE features like this? Wouldn't that make a hell of a lot more sense then trying to increase the threshold time?
Click to expand...
Click to collapse
I dunno. It can really go both ways to be honest. I don't think it's a massive flop by any means. I'm personally not the biggest gamer so it's not a big deal to me. But I do see where it's a bit of a ***** as well.
Hopefully they think of something constructive to address the challenge.
Thanks, plz keep us posted about this issue, this glitch is the worst of all. I hope they can fix it soon, altought i thought that they will fix it on the last release 4.1.83 but they did not!!!
It isn't completely without reason, though... So I don't think anyone can really call it a"glitch". That would be like saying the touchpad on a laptop it's glitched because the cursor won't move if you're palming it, even though most have features to prevent movement in such situations. It's basically to make sure the screen is still usable should it get a spot of water on it. But I guess if they didn't have such a measure, we'd possibly be reading threads complaining about the opposite.
Sent from my MB860 using XDA App
Techcruncher said:
QUOTE:
The 30 second threshold is actually something built in to aid in detection of moisture on the screen and normalize the touch plane (like shaking an Etch A Sketch). The algorithm is this case assumes a finger that is on one spot for an extended period of time is actually a drop of water. If the finger is removed from the screen, touch should become usable again in a second or two in that spot. The touch driver would then detect essentially a "negative touch" in the area where the finger was removed and do a screen calibration (shake the Etch A Sketch again). We are looking into what can be done to increase this time threshold for you gamers and still provide a good water immunity experience. The tradeoff would be if your phone screen gets wet (rain or mist), the touch on the screen would become basically unusable. Stay tuned to this thread for updates.
Click to expand...
Click to collapse
https://supportforums.motorola.com/thread/47362
Link to the actual thread where the quoted quote was said.
Quoted quote.....
elementaldragon said:
It isn't completely without reason, though... So I don't think anyone can really call it a"glitch". That would be like saying the touchpad on a laptop it's glitched because the cursor won't move if you're palming it, even though most have features to prevent movement in such situations. It's basically to make sure the screen is still usable should it get a spot of water on it. But I guess if they didn't have such a measure, we'd possibly be reading threads complaining about the opposite.
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
I don't think I would ever say "This is horrible. I can't believe my phone doesn't work when I leave drops of water on the screen for 10+ secs!"...
Now, I say this all the time "I can't believe that I can't play most emulator games on the Atrix because I can't leave my finger on the same spot for 10+ secs"
I just hope that this doesn't have anything to do with hardware and more of a software problem (feature).
there should be a way for games to turn that off.
How do other phones handle that? HTC, Apple?
I agree, there should be a way to turn it off. They may have an explanation, but there really is no excuse when other phones like the iPhone handle such things completely seamlessly. Their implementation and solution to the perceived water issue may work, but only under ideal conditions (ie. where you aren't needing to touch the screen for some time).
I don't get this, who leaves water drops on their screen for 10+ second while they're using it? If I'm getting this straight, it will only ignore the input after it has been sitting there for a while.
The reason I post now is that I was using my SGS in the rain the other day. It actually did go wonky when some big water drops landed on it, but my reaction was not "gee I hope there is an algorithm that will ignore that input in 10 seconds" it was to wipe the water off and get to cover!
I game and never had a problem with this.
Sent from my MB860 using XDA Premium App
I smell a "smart screen" toggle widget...
Sent from my MB860 using XDA Premium App
If you have water on your screen for more than 10 seconds, you have bigger problems than whether touch is detected from that water drop or not. </dead phone>
Sir_Brizz said:
If you have water on your screen for more than 10 seconds, you have bigger problems than whether touch is detected from that water drop or not. </dead phone>
Click to expand...
Click to collapse
uuh... last time i checked, water on the screen won't kill the phone.
And i don't think it's only referring to "Hey look, it's raining. Those drops of water might affect your touchscreen." I can't imagine tiny little droplets possibly from the process of wiping the screen wouldn't have the same effect.
maledyris: Well... that's also the iPhone... who's vast majority of users probably wouldn't be able to tell you why a capacitive touchscreen is leaps and bounds better than a resistive touchscreen, or even what the difference is. All they know is it's from Apple.... and has the GB's and the WiFi's.... and every sheep in town has one.
elementaldragon said:
uuh... last time i checked, water on the screen won't kill the phone.
Click to expand...
Click to collapse
You're right, but how many people just let water hang out on the screen for long periods of time? I know I wipe it right off. A drop sitting there for 10+ seconds probably means water is getting behind the screen, probably means say goodbye to your phone as it is about to die.
Sir_Brizz said:
You're right, but how many people just let water hang out on the screen for long periods of time? I know I wipe it right off. A drop sitting there for 10+ seconds probably means water is getting behind the screen, probably means say goodbye to your phone as it is about to die.
Click to expand...
Click to collapse
I don't think the water just goes through the screen, only entrance I see is through the speaker port

[Q] Glass back shattered

Having just come off the phone to my Network, I'm worried about my choice of Nexus 4. My first one I have had less than a week and this morning the back glass went ping whilst it was sitting on the sofa doing nothing, the entire back just shattered all on its own.
The Network operator advised there are issues with leaving the phone on charge for long periods and the battery overheating causing the glass to shatter. I was offered an alternate phone, but I actually like the Nexus so am giving it another go. Has anyone else experienced anything similar?
I'm used to charging my phone overnight whilst in bed as I don't feel this is excessive over charging????
This.. this is making me concerned for my phone.. I've never left it charging over night intentionally as it wears down battery health but I have forgotten with my other phones..
It's the heat, do you live in a child country, or keep the ac low? Since the glass is thick, the temperature gradient between the two sides causes expansion like in a bi metallic strip, causing it to bend, and eventually crack as strain goes beyond the critical point of elasticity. 11th grade physics
Sent from my GT-I9100
If I helped you, please hit the thanks button!
---------- Post added at 12:10 AM ---------- Previous post was at 12:09 AM ----------
Long story short, don't subject the phone to a temperature gradient of more than 7-10 degrees Celsius, the glass will break, gorilla or no gorilla
Sent from my GT-I9100
If I helped you, please hit the thanks button!
euki69 said:
This.. this is making me concerned for my phone.. I've never left it charging over night intentionally as it wears down battery health but I have forgotten with my other phones..
Click to expand...
Click to collapse
No such thing as all modern phones/batteries have circuitry built in to prevent overcharging. The phone will tell the AC adapter to stop supplying power and as such it does. You can keep devices plugged in for days without any current reaching the battery. If your phone is still charging past 100% then that's a faulty AC adapter which should be replaced.
It's -20C outside now while inside being 20C so that's a 40 degree difference and I have no issues with my phone just cracking out of no where. Glass surely will crack under drastic temp changes but definitely not that easy, especially tempered glass on (like such on cars).
shotta35 said:
No such thing as all modern phones/batteries have circuitry built in to prevent overcharging. The phone will tell the AC adapter to stop supplying power and as such it does. You can keep devices plugged in for days without any current reaching the battery. If your phone is still charging past 100% then that's a faulty AC adapter which should be replaced.
It's -20C outside now while inside being 20C so that's a 40 degree difference and I have no issues with my phone just cracking out of no where. Glass surely will crack under drastic temp changes but definitely not that easy, especially tempered glass on (like such on cars).
Click to expand...
Click to collapse
I can only go by what my Network told me, I was placed on hold whilst they contacted the Nexus Team whoever they are. When he came back he stated that I had left my phone charging for too long which would have likely caused the glass to fail.
Even I was shocked when I saw the shattered glass and thought they're going to think I dropped it. But then dropping the phone with the special glass shouldn't cause it to shatter, maybe a crack or two, but as per the picture this is an all over shatter.
Maybe I just had a one off duff phone, time will tell as I've ordered a replacement as I actually love the phone itself. Had a HTC for 2 years with not a scratch as I look after my things.
Hantslad said:
I was placed on hold whilst they contacted the Nexus Team whoever they are. When he came back he stated that I had left my phone charging for too long which would have likely caused the glass to fail.
Click to expand...
Click to collapse
Sorry but this is utter nonsense. If this is really what they said, then either they were winding you up for a laugh, or they didn't know what they were talking about.
Sent from my Nexus 4 using xda premium
steviewevie said:
Sorry but this is utter nonsense. If this is really what they said, then either they were winding you up for a laugh, or they didn't know what they were talking about.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Maybe they thought it was funny and were winding me up then. I guess they just replace phones for no reason?
I'm pretty sure if there were no known faults they wouldn't just offer a free exchange or an alternate phone if they thought I'd smashed the thing myself.
Mine broke by being in my pocket just the other day. It's on it's way to LG right now for possible Warranty work.
shotta35 said:
Glass surely will crack under drastic temp changes but definitely not that easy, especially tempered glass on (like such on cars).
Click to expand...
Click to collapse
Its not the glass affected by temperature changes, rather the metal components and frame that are. This "can" cause glass to crack.
Did your phone have any kind of skin or protector on the back?
I have heard stories of cracking from temp changes.
I have a front and back protector and have not had any trouble with mine going from zero degrees outside to 70 inside or vice versa.
euki69 said:
This.. this is making me concerned for my phone.. I've never left it charging over night intentionally as it wears down battery health but I have forgotten with my other phones..
Click to expand...
Click to collapse
Leaving it charging over night has absolutely no ill effects on the battery.
Sent from my Nexus 4 using Tapatalk 2
Hantslad said:
The Network operator advised there are issues with leaving the phone on charge for long periods and the battery overheating causing the glass to shatter.
Click to expand...
Click to collapse
Hmm I charge my phone during night since november and still perfect
Are you making this story up mate? I don`t believe a word of it and it sounds like troll language to me Damage like that seems to be caused by a fall (flat on it`s back) rather than a overheated battery imo. It would take a sudden 40-50 degrees Celsius increase and most probably the glas would melt rather than break. Breakage is caused by temperature differences between the inner and outer side off the glas. And you don`t have it fixed allthough they offered it too you?
Hi
It looks like a typical stress fracture of the glass.
I'm not convinced normal changes in temperature is the cause as otherwise we'd not be using glass for windows!
Charging overnight is perfectly safe and doesn't harm the battery. Lithium batteries explode if constantly charged so the charging circuitry is carefully designed to monitor the charge and stop it when the battery is full. There are also safe guards in place, which likely the red flashing LED issue is an indicator of a fail-safe being triggered.
Sometimes lithium batteries go wrong. The lithium batteries in the Nexus are not in a rigid metal can like most but a different technology that allows them to be in a soft foil packet, much like you might find food in. This means a fault can cause the battery to expand, this would deform the back, stressing the glass and breaking it. Typically with such a fault there will be heat, so 1st line support on hearing of customers finding a hot phone with a smashed back may be coming to the wrong conclusion that heat is the cause.
The only people that know the truth are LG who will find these phones winging their way back to them, and unless this is a huge problem where a recall is required, we will probably never know or be told of a confirmed cause of these "Unexplained Spontaneous Back Shattering" events or USBS, and there probably isn't one single cause anyway.
Regards
Phil
gee2012 said:
Are you making this story up mate? I don`t believe a word of it and it sounds like troll language to me Damage like that seems to be caused by a fall (flat on it`s back) rather than a overheated battery imo. It would take a sudden 40-50 degrees Celsius increase and most probably the glas would melt rather than break. Breakage is caused by temperature differences between the inner and outer side off the glas. And you don`t have it fixed allthough they offered it too you?
Click to expand...
Click to collapse
Why would I make it up? I asked the question if anyone else has had similar issues as when my replacement arrives on Tuesday, if it happens again, I would like to know if it is infact a common issue.
Had I have dropped the phone I would be asking if anyone knows how I could get it fixed. Why would anyone waste time posting a load of lies?
As it happens 3 Network have advised they are aware of over charging causing the back glass to break, although I don't see any warnings or advice over how long you should keep a phone on charge.
I fail to see how what I have stated has given you reason to think I am trolling. I am happy with the phone itself and feel it's worth another go as it's fast and to be honest is one of the best handsets I have had.
Hantslad said:
As it happens 3 Network have advised they are aware of over charging causing the back glass to break, although I don't see any warnings or advice over how long you should keep a phone on charge.
Click to expand...
Click to collapse
Sounds like 3's support staff don't know what they are taking about.
Sent from my Nexus 4 using xda premium
steviewevie said:
Sounds like 3's support staff don't know what they are taking about.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Now, this I can agree with. The reason I have given the phone a second chance is that I believe I had a duff phone. I was offered a different phone, but stuck with the Nexus as I actually love it so far.
When I contacted 3, they placed me on hold for a few minutes and came back to advise they had spoken to the Nexus Team, wether that be at 3 or Google, I have no idea. The conversation was almost accusing me of over charging, but being an average phone user I do not know what over charging is. I just plug the phone in and leave it as I always have with previous phones.
The phone itself was not in any pocket, but just sitting on the sofa when it shattered and I too find it hard to believe it just shattered by itself, but in all honesty it did! I have no reason to come on here and say otherwise.
Let's hope the replacement will give me many hours of use, I've ordered a 2 cases to ensure if I do drop it, I get some protection.
Overdose1986 said:
Hmm I charge my phone during night since november and still perfect
Click to expand...
Click to collapse
+1
I have charged overnight every night since November with no ill effects. I've used various nexus and non-nexus chargers.
I've also never used a screen protector and have had no scratches. I have a 3 quid S tpu for the back and sides.
Sent from my Nexus 4 using xda premium
I've never not charged a phone all night. If I had to wake up at 1 or 2 in the morning to unplug this phone I would sell it today, that is ridiculous. I can't believe that LG or any company would think that this would be acceptable in 2013. Maybe back in the stone age but not today. With that being said, my phone is still in perfect condition with a protector on the front and back. The only thing that drives me crazy is the creakiness of the phone. I hope this crap gets straightened out.
Sent from my Nexus 4 using xda premium

SPEN Inconsistencies (With Picture)

I got my tablet a couple months ago and it had been working great up until around ~4 weeks after I got it. Perhaps I didn't notice before, but my spen periodically creates "tails" when I end my strokes. (Picture below)
I've tested a few apps (including snote) and it seems to happen in all of them (except layer paint!). I doubt this has anything to do with the tablet itself... I'm more suspicious of my spen's pressure sensitivity being wonky.
Have any of you experienced this before?
XDA won't let me hyperlink since I'm new
i.imgur.com/se29IqJ.png
Thats because the tip hasmt finished coming up before you move the pen
Sent from my GT-N8013 using xda app-developers app
Cykon said:
I got my tablet a couple months ago and it had been working great up until around ~4 weeks after I got it. Perhaps I didn't notice before, but my spen periodically creates "tails" when I end my strokes. (Picture below)
I've tested a few apps (including snote) and it seems to happen in all of them (except layer paint!). I doubt this has anything to do with the tablet itself... I'm more suspicious of my spen's pressure sensitivity being wonky.
Have any of you experienced this before?
XDA won't let me hyperlink since I'm new
i.imgur.com/se29IqJ.png
Click to expand...
Click to collapse
Just wondering, do you use a case with magnets in it? Some users have reported the magnets interfering with the wacom digitizer
That behavior is not characteristic of magnetic interference.
It's more likely just the pen tip not being completely lifted fast enough.
klau1 said:
That behavior is not characteristic of magnetic interference.
It's more likely just the pen tip not being completely lifted fast enough.
Click to expand...
Click to collapse
I'm using Samsung book cover case
Take a look at the threads discussing magnetic interference's effect on S-Pen and the pictures posted.
They don't look like that.
Cykon said:
I'm using Samsung book cover case
Click to expand...
Click to collapse
Official Samsung book case cover?
Anyway, best thing to do is take the case off and test. IF its still doing it then you know its NOT the case as Klau1 suggests. IF it stops, do a few more tests with and without the cover and then do a few graphs and write a thesis on it, you know for science
It may also be the sensitivity of the spen that is causing it......
Riki1kenobi said:
Official Samsung book case cover?
Anyway, best thing to do is take the case off and test. IF its still doing it then you know its NOT the case as Klau1 suggests. IF it stops, do a few more tests with and without the cover and then do a few graphs and write a thesis on it, you know for science
It may also be the sensitivity of the spen that is causing it......
Click to expand...
Click to collapse
Yeah sorry lol, I sent that one from my phone.
It is Samsung's official book cover case, I tried taking it off and it still seems to make the same stray marks... I followed up by adjusting the potentiometer and yet again, the same marks... with a less sensitive stylus.
I always wanted to buy a better stylus anyway, so I might do that and see if it helps resolve the issue... well at least kind of resolve =/
yes, it's just the stylus. Same happens on mine depending on how you handle the pen.
I had the same problem when I was installing N8010 4.1.1 Rom on my N8013

Heating problem (Not sure if I'm facing it)

My friend had told me that this one is likely to suffer from heating problem.
I've just bought one yesterday. The production information as follows; February 2013 in Korea.
Normally when it is connected to the usb cable for charging, no heat is observable. However, when I graph it and start using a little, like going through settings menu, checking the photos on album and stuff like that, its upper part gets a little warm. I mean it is not too hot to touch but you can tell the difference between the bottom and top of the phone. When playing games, the heat is much more perceivable.
The phone I was using before that one was a low level phone, so never ever faced such problem on it.
So, is this normal ? Or do I have to take the necessary actions and change it as I have the time to do so.
Or is there a certain way me to try if it is really defective or not ? Cause I can't be sure either I'm so picky or it is really defective.
Thanks in advance.
It's because of the glass. The phone doesn't produce any more heat than it should. In fact some phones run hotter. The glass conducts the heat and you feel it. There are probably 20 threads about this already. Please search next time.
estallings15 said:
It's because of the glass. The phone doesn't produce any more heat than it should. In fact some phones run hotter. The glass conducts the heat and you feel it. There are probably 20 threads about this already. Please search next time.
Click to expand...
Click to collapse
So, do you think that one I have, is not problematic ?
dango1 said:
So, do you think that one I have, is not problematic ?
Click to expand...
Click to collapse
That is what I'm saying, yes. The device will throttle the cpu to take care of the heat. Charging will produce more heat. This is all normal behavior. Stop worrying and enjoy your Nexus.

S-pen stray lines

A picture is worth a thousands words
I have circled in green the correct lines, in red the stray ones.
Why does it behave this way? It is no even co sistent, that is it does not happen always on the same spot
I get that too, don't know why.
Me too
Verstuurd vanaf mijn GT-I9300 met Tapatalk
I think it is happening because the pen is not communicating with the screen properly. Meaning that when you lift the pin up instead of pulling it straight up you're pulling it slightly at an angle and the pen is still close enough to communicate with the screen.
Sent from my GT-N8013 using XDA Premium HD app
Temetka said:
I think it is happening because the pen is not communicating with the screen properly. Meaning that when you lift the pin up instead of pulling it straight up you're pulling it slightly at an angle and the pen is still close enough to communicate with the screen.
Sent from my GT-N8013 using XDA Premium HD app
Click to expand...
Click to collapse
Exactly, im thinking that too. Or atleast it looks like that when writing. It's annoying but you can live with it - i dont care show much about it when writing, but when drawing it is awful.
enigma_x said:
Exactly, im thinking that too. Or atleast it looks like that when writing. It's annoying but you can live with it - i dont care show much about it when writing, but when drawing it is awful.
Click to expand...
Click to collapse
Might be the damaged SPen nib.My one was kinda wearing out so it justs does crazy stuff.Try replacing it to see if it works
Its not damaged, don't waste your money on a new one. It's Samsung's fault as they didn't fixed all the bugs in the firmware when they developed the product. I have lots of friends that use Note in school and everyone has this problem. That includes n8010 n8000 n8013.. The solution is either try using LectureNotes and apply some of the built in filters or try to teach yourself how to write in a way that there are no nibs. Also, be aware that some parts of the screen are more affected than other parts.
I think i might have insight here..
I recently looked into dev settings on my nexus 4 and set 'show pointer" out of curiosity. It is very interesting how the systems tells you not only the coordinates of the pointer, but the change in x- and y-coordinates, aka the speed of your finger as you glide. It also extrapolates where your finger would end up based on that speed, much like a momentum simulation.
I think whats happening here is that as you lift, you might flick the tip just a millimeter or so but at a high speed and the system extrapolates the line quite unnaturally. I might be wrong here tho, its just a theory.
Edit: looking back at the photo, notice that the lines happen as you lift the pen and not as you set it down..
Sent from my Nexus 4 using xda app-developers app
Happens to me too. I don't think that everyone here doesn't know how to lift a pen when they stop writing.
That doesn't make sense. It's a Samsung issue that I hope they fix in the next update.
thegios said:
A picture is worth a thousands words
I have circled in green the correct lines, in red the stray ones.
Why does it behave this way? It is no even co sistent, that is it does not happen always on the same spot
Click to expand...
Click to collapse
Does your case have a magnet on it? Sometimes magnets mess with Note 10.1 S-Pen.
Hahahalalala said:
Does your case have a magnet on it? Sometimes magnets mess with Note 10.1 S-Pen.
Click to expand...
Click to collapse
I have the original samsung case that yes, have small magnets on the edge and in the middle
thegios said:
I have the original samsung case that yes, have small magnets on the edge and in the middle
Click to expand...
Click to collapse
The original samsung case shouldn't give any problems,. but try taking it out for a while and see how that goes.
If not, call Samsung Support.
So far, I'm not able to replicate the stray line issues here, but my case (some generic flip cover with an elastic band to hold it shut) does not have magnets because I was concerned about the effect on the s-pen behavior so it could be that.
However, in terms of a fix you could try adjusting the sensitivity of your s-pen itself.
CAUTION!! you may damage it by doing so, I'm not responsible etc etc, do at your own risk !! ---
The click button along the side of the s-pen (with the ridges in it) is remove-able and underneath it is a screw you can adjust (in very small increments please) to adjust the sensitivity of the pen. The screw NEAREST the pen tip (there are two screws next to each other) is what you would adjust --- going CLOCKWISE to DECREASE sensitivity, and COUNTER-CLOCKWISE to INCREASE sensitivity.
I adjusted it to be slightly less sensitive as my pen was registering on the screen sometimes without touching it --- it appears that the tail-ended portions of your E's may also be a result of over-sensitivity.
YMMV of course

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