When I try playing Spotify on my iPhone4 over the USB (2011 328xi), it will play for 20-30 seconds and then stop until I hit "play" again in the app. However, it'll stop playing just a few seconds later and I can't get it to consistently play. Not sure if having a jailbroken phone is causing the issue.
I have tried the Music Controls Pro jailbreak app, but that did not solve the problem. My only other thought is seeing if the new iDrive update that supposedly was pushed to dealerships last week can fix my problem.