Lin - Thanks so much! Because of your question, I realized that my iPad was in need of an update (the last update failed, for some reason, and I’d forgotten about that). So I updated the iPad, and so far, Zwift on the Apple TV now seems back to normal.
I don’t understand how the version of iPad iOS affects how Zwift is working on the Apple TV. Because of the Companion app link via the iPad? At any rate, all seems OK for now.
I really appreciate it!
I now have: Apple TV OS v 13.4
iPad OS installed today v 12.4.6
And Zwift 1.0.49822 on both of them.