Thanks. It was a new install and I got tired of spending so much time on the issue, so I reinstalled NOT copying the prior partition stuff, and it’s fine now. When I don’t have a bunch of customization done on the system, sometimes it’s more efficient to just reinstall than spend a lot of time troubleshooting a rare problem like this.
I guess an old entry that uses the by-label identification was copied while in fact that label was removed during the install. Or something similar. Could have been repiared easily imho.