I have also experienced this issue last night, it was driving me bananas. I was in a F18 , It does not appear to be a model specific bug, could be related to textures in mirrors ? Otherwise I'm glad this is a known bug and is affecting others, I thought I broke something in my settings for a while
I did find out that if I flip up my mirrors, the texture glitch no longer occurs. Can anyone else confirm that flipping up your mirrors or disabling your mirrors fixes the issue?
***UPDATE***
After reading some other threads I think there are in fact 2x bugs, yet, could be the same root cause.
Bug#1, the first bug would be the screen flickering as @Callsign JoNay posted, if you notice closely it appears to affect a portion of the screen and goes away quickly. In some cases in other videos if affacts the whole screen, a quick >1 second blink that can become rather annoying. I have not seen this issue.
Bug#2 the second bug is the actual bug I have experienced, where the black box will appear as @SignorMagnifico originally posted above. This one appears to remedy itself after disabling the mirrors. The black box could be perceived as flickering, however, if you keep your head still in VR it will never go away. So in fact they are not the same.
@PHMAC I think this is a different issue entirely, yet , could be related. The problem I was having is that a black box will appear on your screen. As opposed to flickering and just going away, the black box will stay there if you don't move. It def appears to be some sort of texture issue. Good find though, hopefully it gets fixed soon.