I thought this problem was fixed.  I had a missing library for over 6 months on my Apple TV 4K.  Then it magically appeared again one day with no word from support that it was fixed.  This problem is back again.  Signing in/out does not help.  This problem also exists on the TV app in Catalina.  Why can't Apple fix this?  Have contacted Apple Support over a week ago and sent screenshots and logs and no word yet.  Itunes Movies and TV Shows apps still work fine.