RAW photos have purple and green streaks..WHY??? HELP PLEASE! - Samsung Galaxy S8 Questions and Answers

My RAW photos of images shot in low light have this permanent purple and green concentric circles all around the image. Is this happening to anybody else? It's really making the RAW feature useless for me in low light. I'm fairly sure they would be present in the good lighted photos but not visible because it's not very dark. Please help! Thanks a lot!
Here are 2 images, normal exposure and higher exposure to see the problem easily.
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ibb.co/h05aLo
ibb.co/inO1t8

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htt p://img441.imageshack. us/img441/7022/img2485n.jpg
As you can see here, isntead of fading smoothly from the red to black, it does those ugly layers. I first noticed it when I had this picture set as the lock screen picture because it does it there too. In bright light its almost impossible to tell, but in the dark it tooks terrible.
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Might be hard to see, but to show what I mean:
htt p://img541.imageshack. us/img541/3236/img2488c.jpg
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