I was always able to play Spotify in my Audi until the latest update to 0.7.2.26. Now when I click on a song in Spotify it starts for 1 second and then the system switches to the iPhone Music App and starts playing a song from there. It occurs on all songs regardless if its a streamed or a downloaded song.
I deinstalled the Spotify App and installed it again and it worked for about 15 minutes. Then the problem occurred again.
I connected my iPhone 5 (latest Version 6.1.4) including Spotify Premium (latest Version 0.7.2.26) with my Audi A3 (2013 latest Software Version 42.2.0) with an original Audi and Apple iPhone cable and did not change anything instead of installing the latest Spotify Version. Hence I think the update changed something in the software that produces this bug.