[2021] Weird shading/texture issue

I have fully optimized my game through settings/guides, but recently have been getting weird bright flickering on certain surfaces... certain sidewalks in Carentan, many rocks on most maps, and the sky in Ste Marie DuMont flicker like crazy. They sort of have a flowing effect like you would expect a river to have with an intense flicker.

The kicker? I go to screenshot the issue and it always captures the "normal" state and I can't emulate the rapid flickering... is there anything on my end? I know little about graphics etc and tried changing a setting one by one to no avail.

Thanks!