I am also experiencing this. I had initially assumed it was because my VRAM was dying and I would have to replace my GPU, but after significant stress testing I find the GPU is fine and this only happens in the UE5 editor.
I am not sure what causes it, as it’s happening in pretty basic scenes for me (although limited to the edges of the viewport)
@HAF-Blade, hard to communicate what one has done to bring it up when there is no obvious cause.
However at the very least I can confirm that OP is not alone in experiencing this