Is there some kind of limit on how many artists/songs you can add to a station?
Started an iTunes Radio Station. Started with a few artists, played fine. Added a bunch more, about 20 total. Not closely related, but all "alternative." It stopped playing. On Mac, hit play, progress bar turned to a stripe, then it would pause. Tried on iPhone, the station wouldn't start playing. Other stations played fine. Removed some artists so there were 10 total. Station now plays fine.
Started an iTunes Radio Station. Started with a few artists, played fine. Added a bunch more, about 20 total. Not closely related, but all "alternative." It stopped playing. On Mac, hit play, progress bar turned to a stripe, then it would pause. Tried on iPhone, the station wouldn't start playing. Other stations played fine. Removed some artists so there were 10 total. Station now plays fine.