Meshes and shadows flickering

Hello everyone, I’ve been using UE 5.3 for a short time and I have a flickering problem on meshes and shadows, which I can’t solve: I’ve already made many attempts reading the various tips on this forum but I still haven’t been able to solve. My models are leaning on a base of about 1mtx1mt and the chamber set at an opening of 4.6. I’m working on a computer with 128gb of ram and an rtx 4090. I think the problem is in some render setting, or can it also depend on the meshes?
I remain available to provide any other useful information to solve the problem.
Thank you!

I have the same problem. You didn`t find any solution?