Some times when I unlock my screen my desktop is completely empty, except for dom0 windows.
The qubes still run, for instance I can still chat in an active Google Meet, just can’t see the window.
The windows are completely gone, as in not visible in the panel, taskbar, or workspace_switcher.
If I then log out and in again, the windows reappear.
Felt a bit odd to stay in a meeting while logging out and back in again.