Do you have the same issue if you follow the OP’s steps to reproduce it?
I’ve had the same issue since January.
Provide extra information to complete the original description of the issue:
All buldings have simply disappeared (except for the photogrammetry buildings, which are intact).
If relevant, provide additional screenshots/video:
I’ve got the same PC specs as yours. I’ve tried cleaning cache, reinstalling, etc. Still no effect.