Can't close Rhino for Mac without saving

My Rhino opened an autosave document, which I don’t care about. I’d like to close it and quit rhino. I get this dialog:
If I choose “Revert Changes,” it fails:
I am forced to save this document that I don’t want before it will let me quit.

This one was a bit tricky to reproduce, but I managed it…and the steps point toward a culprit:

Logged here: RH-68907 Revert on Autosaved Recovery file fails and gets you into a Save or Cancel loop

Thanks @andheum !