White horizontal line in center

I got a white horizontal line in middle of my iphone 13 pro max during (ios 16) update. (Its not due to drop or hardpress)

In starting sometime its disappears like 2 days

and then 3rd day suddenly its comes again.

This white line sometimes blinks in green and yellow color.

I think so this is (ios 16)Bug or glitch didn’t know exactly

i also did factory reset and new software updates but its not working

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