iPhone 11 Pro Black screen during call

Hello everyone ,

i noticed after a couple months of using my phone that when im having some call no matter from 1 minute or 30 minutes , or i remove from my ear to see the time iPhone won’t show screen unless i wipe top of the screen .

First of all i think it was the screen protector but it wasn’t. First month of use i have no screen protector same thing.

The sensor pick up the smudges from the screen and register like object.

On my previous iPhone 8 i have no issues at all .

Can you share your experience here please it’s very annoying..