To reproduce:
1. Open the attached repro project
2. Build for WP8
3. Open the solution with visual studio
4. Deploy to a windows phone
5. Wait until music begins playing
6. Pause by hitting the 'home' button
7. Resume by hitting the 'back' button
8. Notice that the music stopped. If it didn't stop, repeat step 6-7
9. Press the 'back' button - it calls Application.Quit() - nothing happens, the app hangs
Only happens when deployed from visual studio