Grey Flickering in VR on Quest 3

Hi there,
I am having some strange visual issues when exporting my quest 3 project. As you can see in the linked video. I realize that this likely has something to do with the other meshes in the scene as the issue reduces/disappears depending on how many of the other meshes I hide. I am at a complete loss of what is causing this and how to fix it. Any ideas?

Godot 4 on the Quest 3 has several issues that need to be fixed before we can use it as an export target.