iPhone 11 high pitch sound when recording?

Hi!

I replaced the screen of an Iphone 11 Pro at a phone repair shop this weekend because the old was cracked and unresponsive.

After I have noticed a high pitch/static when recording with Snapchat and also with the camera app at 0.5x only strangely.

If I record normal 1x with the camera app I don't have this sound. Same with calls the high pitch does not appear.

Anyone know what could be the problem? I have read that the iphone 11 have 3 different microphones. Could maybe one be faulty? Or do you guys have any suggestions?

Thx!