Hey guys, sorry I didn't realized I'd sparked such a lively discussion.
I am definitely not seeing the same issues as @Jazzadanub, water and everything looks normal. I just randomly get large chunks of my view covered in black squares occasionally.
I haven't had time to check back until now. It seems I am not seeing this at all in 2D. I'm using Virtual Desktop on a Quest 3. While it is worse, it definitely isn't exclusive to VD, it happens using Oculus Link as well. Its not as bad as it when I tried it the other day but its still happening and its still annoying. It doesn't appear to show up in tracks or video at all, I tried multiple times. The mission that seems to do it the most is the Case 1 Carrier recovery mission in this track file. This was with Virtual Desktop. It flickered twice right after closing the briefing, then not at all in that track. I recorded a video of that one and the flickering didn't show up at all so I didn't bother posting it. I'm normally running Open XR Neck Safer and SimShaker while playing DCS, neither were running during this test.
I think this may actually be the result of the game stuttering but I'm not 100% sure. I've used VD pretty reliably for a couple months now and still have not seen anything like this with any other game, sim or otherwise. I just recently did a full reinstall of DCS in March after having an endless string of issues that I thought were caused by the new unified game version but that turned out not to be the case. Since finding the root of those, mostly USB issues, DCS has worked pretty well up until last week.
Flicker1.trk