Left Side of my iphone XR screen become unresponsive intermittently
I have noticed just now that left side on my screen becomes unresponsive suddenly. I cant go back if to previous pages because the back arrow area is unresponsive, can't type "a" or "1" due to same issue. but after several touches i can type "a" or "1" or go back tp previous window.
I cleaned the screen, reset to factory default and then restored, several reboots but status is same.
It was working fine until the evening. don't know what happened. any clue?
iPhone XR, iOS 14