Just curious, have you turned the phone off and back on to see if it still happens? Funny as it may seem, that is the first step in troubleshooting such issues.
I have a Samsung Galaxy S7+ tablet that seems to be having a similar display issue periodically in just the past few days. I did have a recent system update and I wonder if it might be causing the issue.
Did your phone get any recent Android updates?
FWIW: My Samsung Galaxy S21 is not having the same problem.
Just another day in paradise.....
Bookmarks