I'm using a Samsung Galaxy S20 Ultra G988B
while using the phone my screen sometimes glitch.
while I'm playing a game or watching a video it will glitch and pause the video or the game.
when the glitch happens you see the navigation bar turns white as well as a white bar at the top.
I've attached link to the video of what's happening
My screen flickers too when scrolling trough Google search, but i noticed this came with the latest update, so i guess it's a software bug. I hope they will fix this soon, like the compass bug (random vibration).