"Blocks" forming within layout generator

When using a chooser in my current scenario, I find that the view inside the layout generator gets very “blocky” and does not show me what is actually present within the world, any tips on how to fix this? Thanks

I stumbled on this visual glitch myself, usually re-rendering the terrain helps, or even just zooming in and out or changing to the 3D view and back…it should be temporary.