When you just move around the stage in dark places with shadows, everything starts to ripple or something.

Greetings, I really hope that someone has encountered this. At some point (I didn’t even pay attention), strange things began to happen, probably with shadows. When you just move around the stage in dark places with shadows, everything starts to ripple or something. I’m attaching screenshots and videos for a visual example on the wall. Don’t look at the lighting without baking! Even after baking, the problem remains!