I thought it was a bug, but it’s a feature:
ARC doesn’t gracefully recover from a drop in mobile signal, which means it stops playback and forgets what it was doing saying “Nothing Playing”. When signal is restored - seconds later maybe - you can’t resume where you were. You have to go back and find what you were playing manually and start again, which is frustrating.
It’s a small thing to improve, but a big price to pay with your limited upvotes.