Windowed-mode breaks SSAO on high and very high settings.

[sekrua]

Currently there is a bug where "high" and "very high"-settings of SSAO cause checkerboard-pattern artifacting and flickering on affected surfaces.

For comparison, here is the game at max settings on fullscreen (Very high SSAO is working correctly)

Here, in windowed mode you can see strange rectangles/checkerboard pattern all over excalibur's torso.

Here's Windowed-mode on "medium"-SSAO as you can see it's perfectly fine.

I've tested this on both DX11 and DX12. The issue affects both renderers.

Additionally I've managed to recreate the bug on a laptop with a different GPU (both AMD and NVDIA are affected).