I am having the same issue. its driving me crazy. i tried all the following but nothing helped:
1. turned phone on and off
2. restarting the phone (home + sleep)
3. recovery mode didn't help either and just to be sure, the phone was never jailbreaked.
Im not even trying to backup 32GB then restoring the phone as new because im sure its a bug. i could then just simply restore the phone back from the backup but really, i dont have time nor the energy to do it.
And im not the only one. i know only 1 day just passed since the update but more people will be writing about this over the internet soon i guess. Its already on Reddit. So overall i guess its a bug and im willing to live with it but c'mon Apple 🙂
Hopefully it will be addressed otherwise i'll just disable it from the restrictions menu. And yes, im getting the same list of artists on iTunes on the PC although i already unfollowed them!!!
Cheers,
Alex