Screen Flickering in Standalone Game

I am having an issue with my game, when ever I play the game in Standalone Game or when I package it I get this strange flickering. If I push F2 for unlit mode it looks fine, and it also looks fine in the Selected Viewport and the New Editor Window. This problem was happening in 4.11.2 and i couldn’t fix it, so I updated to 4.12.0 Preview 1 and it is still happening. Any help is greatly appreciated!

A video of what is happening (in 4.12.0):