u/AccomplishedVast8016

So this is my friend's iphone 13 pro. It was never dropped or anything the screen was replaced but it never showed any issues but just now after the update it started acting wierd like this. It never comes all the time though it just comes when turningg it on in the morning for 5 mins and sometimes when turning on and when the brightness is max this issue occurs lessee. So to resolve this issue what should we do, change the display or any software issues?