Wifi won't automatically connect to known network! - Samsung Galaxy S8 Questions and Answers

I have a problem with my phone. The phone is completely original with the factory settings, with the latest updates from samsung.
I am connected to the router of my house without problems, network options (automatically reconect set) SMART NETWORK SWITCH IS OFF. BUT WHEN I LEAVE AND RETURN TO MY HOUSE, THE WIFI OF MY PHONE IS ON, BUT IT IS NOT RECONECT TO THE WIFI NETWORK AUTOMATICALLY. The phone is on 4g until unlock it, in this moment the phone reconect.
Another situation, I leave the wifi ON, if I enter in a place with public wifi, the phone is not conect to the network until I unlock it.
I try:
*. factory reset...........nothing
*. smart network switch (on/off) ...nothing
*.energy option (on/off)... nothing
Any suggestions?
Thank you very much!

My phone is doing the same thing. This is the first phone I've ever had that does not automatically reconnect to my home Wi-Fi or my work Wi-Fi. Any ideas?

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[Q] Wifi to 3G hand-off problem and vice versa

I'm running Cyanogen 7.2 stable on my Droid 2
It seems I cannot successfully transition from wifi to 3g, or from 3G to wifi without hard resetting my phone. If I turn wifi on, then hard reset the phone, it will connect to my chosen access point, I'll get an IP address, and be able to use internet. But when I go into wifi settings and disable the WiFi, it will claim to connect the 3G but I will not be able to connect to any internet site. The notification area will show 3G icon in white, but never turn cyan to indicate a successful data connection. Trying to turn on airline mode does nothing, and the phone will not go into airline mode until I also, turn it off and turn it back off. Then it will reboot into airline mode. A simple soft reset doesn't seem to solve this problem, I have to preform a power off, and then turn it back on.
Conversely if I set it to use 3G and hard reset it will successfully connect to 3g and work fine, but turning on wifi will result in a connection to the access point but no actual data tansfer. Just as before it will show the connection option's icon on the notification bar will show the WiFi icon but it will say white, and never successfully connect. Alternately wifi will connect and the drop the connection repeatedly.
I've looked all over here, and Google for any working solution but I haven't seen any. Mostly just people having trouble connecting to a specific router, which I DO NOT have. Specially the hand-off to 3G and back seems broken and I have to do a hard reset 100% of the time to change from wifi to 3G and back.
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[Q] After Lollipop update my G2 doesn't automatically connect to my wif router

When I check "Settings-->Network" the Wifi section says "Connection Available". However, it won't automatically change to wifi from my 3G service. For example, if I leave home my phone switches to 3G, but when I return home it stays on 3G. I had no problems with this on KitKat.
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Lately I've been having serious trouble connecting to Wifi networks. This occurs both on my workplace network and home network. I have tried resetting my Network Config, but this didn't fix anything. The only thing I've found that will allow me to connect to Wifi is to restart the device - but I have to do this every time I want to connect to a different Wifi network than I was connected to previously.
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Samsung S8 wifi issues

I am not sure what the problem could be or whether I have to change some settings but my phones wifi as well as the Bluetooth don't work as expected.
I connect to the wifi at home, then if I go out i switch it off, when later in the evening I turn it on again, it doesn't auto connect (despite me clicking the auto-connect checkbox when putting the password) and I have to go back to settings click on the desired wifi and put the password again; this happens also when I restart my phone( it keeps asking me for my password)
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It's a rooted s8 with MAGISK,twrp installed on it.
I have tried to reset network and other setting,clear cache but no success.
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