That’s even more odd, generally with visual artifacting like that it’s major graphical issues. Alright, so I have 2 threads, one I know you’ve seen before but the other is a bit different. They are not for the same issue but generally assist with all graphical issues.
Does this still occur if you change the RHI to DirectX 11 or Vulkan in your project settings or DefaultEngine.ini?
Here’s one that fixes a bunch of very esoteric issues but loses the Geforce experience altogether.