Problem with macOS lock screen functionality.
Problem with macOS lock screen functionality.
Well I can confirm this problem. I think its burn in though. They have this problem on 5K iMacs at my college. When you log out you can still see you username at the top of the screen if you look closely. I think it was most obvious in dark areas. Not sure what it could be other than some sort of short term burn in. Could be a software issue but as it's MacOS you will just have to hope for a patch at some point. Not going to be much that you can do about it.