This just happened tonight, with my phone plugged in via USB cable I can see all my music on my iPhone and select it but it won't play. Ive tried going through tracks, messing with volume, plugging and unplugging. When selecting the song on my phone it will play over the speakers. This issue is happening both over USB and BT. It was late and i admit that I didn't mess around that much to try and resolve it but just curious if any of you guys have had a similar experience.