I have the same issue with a stock Orbiter and DG setup (my Graphics is a Intel(R) Iris(TM) Graphics 550 however).
This behavior appeared quite a long time ago (October 2022! See
this post) on my machine and I could not find out what exactly is the issue.
I had to completely re-install my OS due to an SSD crash (yes that happens!

controller chip bricked) but still the issue is present.
I've then tried some "older" drivers, but still.
I think disabling one of the "enhanced" shaders (Metallness, I believe) was the only "fix", but it's more of a work-around than a fix.
@jarmonik might be the best one to get a grip on this, but since he can not reproduce the issue on his machine this might be very very hard. Maybe a remote session (on my machine) might be necessary, if time permits.