macos – Apple Computers barely visible screen pixel grid noise

Few years ago I noticed that some of my friends Apple devices such as Macbooks, iMacs, Macminis have barely visible pixel grid over image. Mostly visible on gray-ish colors looks like very fine noise over image. But I never had it on my devices.

This year i got new 2020 M1 MacMini with same issue. Device runs absolutely fine, but while photo editing that grid annoys me big time because it’s affect real-end result.

I tried different monitors and even TV same thing. Device connected over UPS so grid noise excluded. Out of curiosity disabled Wi-Fi and BT, issue presents itself.

Is anyone else had this issue before? May be some of the settings affect it?
Running Big-Sur 11.1