Wasn't getting this prior to todays SDK core and sim update.
Happened on a SU7 exported project when going around with DevCam. I was in DX12 mode - I get its in beta but it would be great to know if this is happening because of the beta or something else so we can plan for the future or fix, seemed to be happening with the sample comps as well. They tear off in chunks of squares and reveal default aerial imagery.
I cannot replicate it on DX11 mode for the 15-20 minutes I tried to get them there as well.