On 21.10.27 Beta build for pyxis (Mi 9 Lite):
I've noticed this bug a few weeklies back (not sure when) and the issue has so far not not not been resolved. What essentially happens is that after a while pressing at the top right corner of the screen initiates a gaussian blur (like when you start opening the top notification tray) instead of doing the appropriate action in an app such as youtube or firefox (I am unable to open a new tab in firefox or click on the 'three dots' setting menu in youtube as a result). The blur also occurs on the home screen when pressing that corner.
This glitch is resolved after a restart.
If this sounds confusing, I can record the screen to demonstrate the next time this happens if that's helpful.