me too facing same issue on my note 8 more than 8 months. but nothing changed after so many monthly updates. Samsung won't hear the customers complaints.
same issue with my note 8. no troubleshoot for this. hope it will be resolve in software update. but this issue will Samsung watching or not we don't. waiting more than 4 months
note 8 same problem in all of photos and videos its been after the update pie and one ui. this same problem had been occurred on s9 model and its to be known as black crush or color banding Google it. and it been solved by update only. for note 8 its...