Not sure if it will fix it, but make sure to turn off the autoplay in sync media or play settings. Seems I read somewhere it won't fix it as expected but that might have been an old post or just because it was iPhone. I know of one forum I saw it was specific in to the iPhone because there was no way in the iPhone to turn off JUST the BT media, separate from phone like android does. There were tons of complaints like yours. If I recall, mine would go back to the USB stick over the BT audio unless I was previously listening to the BTA.