Mine does the same thing. Random ghost touches. It started out with just changing to the clock screen and now it messes up everything. Recently it’s been changing the language all the time - sure makes the drive interesting.
I’ve tried everything mentioned here - except for replacing the entire screen. I’m not sure if I want to spend the money on another crap screen from GM or just buy an aftermarket one, so I don’t have to take any chances with this happening again. Does anyone have recommendations for aftermarket displays?