How do I get rid of shimmering, blocky, glitchy reflections.

No mater what level or project I am in, I get glass reflections that either shimmer like a strobe light, have blocky artifacts, or reflected objects pop in and out of the reflection in an unnatural way.

here is an example

I’ve switched between Screen Space and Lumen, adjust the settings in the Project Settings and Post Production Volume and played with some console commands that this forum said would help but none of these seem to fix the problems.

Can anyone help set me straight to just get clean reflections that to glitch out? I’m doing VR spatial videos so any bad reflections really stand out.

Thank you!