It's the Google app. Just disable it. It worked for me for the same issue

Looks of it this issue is pre existing in all amoled displays. I don't think they would be able to resolve this issue. Even if they change the display, not sure if this issue gets resolved.

These support people @samsung_support ask us to raise an error report. Then they will tell that they are investigating it. And never come back or won't even put an option to follow the issue again. It's seriously irritating

Hi Harish. Did u get any resolution on this issue?. I too have raised an issue to samsung and not solution yet.