I think it is a completely nonsense.
Mi 9T and Mi 9 also have an UltraSonic proximity sensor but they have an Pocket Mode option and there are no random display quirks.
Why developers do not implement it to Mi 9SE ?!?!?!?!
1st i have used Stable version but from Sunday i am using a latest weekly build and always the same faulties.
There are no any problems if i turn off all screen wake gestures, and waking my phone with rise to wake or wake it with side buttons :(
Did my phone maybe bad or something?