iPhone 13 display shows intermittent horizontal lines on the screen during loud sounds of any kind

Hello everyone,

I bought an iPhone 13 a few days ago, but it is already giving me the first problems. In fact, I noticed that if I turn the volume to the maximum or almost and play some sounds such as some songs, some ringtones and even background sounds, along the whole screen (especially on the right) you can see intermittent horizontal lines that go to the rhythm of what you are playing. In particular, these lines become very evident if I go into background sounds and start the bright noise at maximum volume (both of the telephone and of the background sounds).

I'll write the steps so you too can try:

go to settings -> accessibility -> audio / visual -> Background sounds (ON and maximum volume) -> Bright Noise. The strange thing is that if I turn the volume down to a certain level, you can't see anything anymore; also i tried doing the same thing on an iphone 12 pro and 13 pro which showed the same problem. At this point I don't know what to think.

P.S.: I attach a photo of the problem