The Tasker event runs when BT is connected, it waits 8 seconds and runs MEDIA_START, then waits 600ms to seek back to the beginning of the track. If BT disconnects during the initial 8s wait (which happens in my car: on startup it connects for a moment and then disconnects before finally connecting permanently), the task is canceled. Tasker also intercepts Media Button Events, to prevent the car from signaling the device to begin playback (which would cause Symfonium to resume wherever it last left off, and not with the specific playlist I want to resume).