I recently deleted all my iTunes music since I listen to everything on Spotify or my podcast app (Downcast) now. I also updated to the iOS 11 public beta. Aroun

I recently deleted all my iTunes music since I listen to everything on Spotify or my podcast app (Downcast) now. I also updated to the iOS 11 public beta. Around the same time my car stopped playing anything via the USB cable, the car just said "no song" so I assumed it was an issue with the beta. Literally yesterday I read about this "fix", so i re-downloaded the Music app and put just one song on it... yep it works! Car players apparently assume you will only ever play music from the "default" library/app so when you connect it and it sees an empty library index, it assumes nothing can ever be played and just stops you there. Very dumb.