Logic Pro X. The last selected audio interface is not available.

Before anyone answers/asks, I do not swap interfaces. I use the same interface (RME Fireface UCX) permanently plugged in via USB in my studio. That interface is selected as the interface in both system audio preferences and Logic Pro X and has been for months.

Yet I still get this message every time I start Logic. The app is quit every time before machine shutdown.

It's more annoying than a blocker, but I'm worried that it means there's another problem elsewhere that I'm not aware of.