Whole screen laggs when I turn around.

I've been playing for a while now Minecraft on this phone. I bought it in December, it's the new Iphone 15 pro max, which is able to support games more complex than minecraft. A few days ago I noticed a lag whenever I turn around. The whole screen goes to 2 fps, just if I turn to look elsewhere. Walking straight or doing actions is not affected.. Everything else works normal. Turning around is what I do every second so it's pretty annoying. Thank you for your time and your help!