Hmmm, I had never seen it until this past weekend. Never happened to me on either 2.11 or 3.0.2 using an iPhone 4 and iOS 5. Switched to an iPhone 5 w/iOS 6 this past weekend and now I see it constantly, but again, only after the car shuts down and restarts BT streaming on the next start up. If I shut down the app and relaunch it the message goes away and everything appears as it should on the Ent screen.
.......here's a lockpick. It might come in handy if you, the master of unlocking, take it with you.