I purchased a new car and setup Android Auto and also transferred my SiriusXM subscription over as well. What I want, is to play tunes from SiriusXM from my car's favorites radio screen not from within Android Auto when I start the car. Last night everything was working like I wanted up to the point where I launched Amazon Music from within Android Auto and played a song of mine. Although the song played was just a test and I stopped the song and closed Amazon Music on my phone thinking it would stop. What happened today was that each time I would start my car, it would start playing tunes from SiriusXM as expected but when Android Auto started, the source of the music automatically switched from SiriusXM to the Amazon Music app from within Android Auto and start playing the song I had played while testing. I looked for an answer on how to cancel this behavior but couldn't find anything so as a last resort, I uninstalled Amazon Music from my phone. There's got to be a better, easier way to stop this behavior but this Newbie can't find it so if you know how to change this, please let me know.