Interior view - Light sources and transparency causing flickering squares

Been experiencing this bug since yesterday, I don't see any other report with a matching case myself but it might've already been spotted.

Can't really describe this one other than saying that whenever I'm in interior view, things that should normally show transparency (such as clouds and vegetation textures) look like they've been rubbed out in MS Paint. The squares are jittery and random, may not be localised entirely to transparent objects but it seems to be the main suspect.

- - - Updated - - -

Trying to troubleshoot and narrow it down myself to try and help a bit.

Dkutch suggested that I try an official map and test different combinations. Testing it on Dry Rock Island with the D15 and the Covet made the glitch happen again, despite being on DRI. It's a lot less noticable on DRI, though. Going to test other cars/maps.

EDIT: I think I've found the link. On the custom map, the issue happens when my headlights or the lighthouse's light casts on the vegetation. On Dry Rock Island, the issue happens when my headlights (and in the minor cases, I'm assuming the sun) casts on the vegetation. It all seems to suggest it's something to do with a combination of using interior view, and light sources casting on objects with transparency.