[Not Dave]

For the longest time, I've used the USB audio in my 2016 X3 with few problems. There were sometimes dropped connections, but nothing major.

Well, something really weird is happening. Whenever I connect my iPhone 6S E (running iOS 11.2.2) to the USB port, and start my favorite radio app (or any sound app)... the phone plays the music, not the car's audio system.

Yes, I can turn the music on and off from my phone's speaker by turning off the sound in the entertainment console (just pushing the button).

Huh?!?

I've seen posts here discuss using different cables. How on earth could that be the issue?

Bluetooth on the phone doesn't seem to connect for audio with the X3 either, though it does handle calls.

What should I try next? Software update?