iPhone media snap-in adapter issue

[Toopskees]

I have the iPhone Media Snap-in Adaptor in my 2012 X5. Whenever I launch Spotify on my device and start to play a track, after a few seconds the play/pause icon turns from || to >, the Spotify playback stops, and whatever I was listening to most recently on the iPod app on the iPhone starts playing. If I then press > on the Spotify app, normal playback resumes. Frequently this will happen one or two more times, but eventually it stops and I can then listen to Spotify uninterrupted. I have noticed this with other audio playback apps (such as when listening to a baseball game with MLB At Bat 11).

It seems that the snap-in adapter "wants" to play the iPod content of my phone and "takes over" control of the playback source. It gets annoying since it happens every time.

Has anyone else experienced this? Is there a way to prevent the iPod from playing back like this?