14pro ios update 17.6 display started appearing white automatically

Hi team,

As i updated my 14pro ios to latest update of 17.6 my display in night gone white automatically, it had come back after i restart my phone but in morning time again it went to white.

I have been following with customer care but i haven’t received any fruitful help. As i got update from service center its an display issue because of weather or sometime before it might have fallen such reasons are so irrelevant with apple. Regardless it my phone has not even have single scratch and display did work after restart and turned white again which clearly states its an ios update issue.