Hi guys
In the static mesh editor, it seems like the grid flickers if post processing is on and the mesh origin point sits exactly on the editor’s “floor” geo. Is this some kind of z-fighting? Is this just how it is, or is there a fix?
Thank you 
Seems like most posts are saying that this is z-fighting, but I agree that it’s annoying and probably should not be happening inside of the mesh editor. I’m also having this issue. Please let me know if you find a decent solution.
One solution is to disable realtime mode by clicking on the down arrow on the top left of the viewport. Just remember that you may want to re-enable realtime mode in order to see real-time animations etc. Hope this helps.