Artist appears in "My Music" on Mac, Windows, iPad but not on iPhone

[user-removed]

Hi, 

today I noticed that one artist and his albums are not listed in My Music on my iPhone. He appears on my Mac, Windows and the iPad version of Spotify but not on my Phone. I installed the newest version of Spotify on all devices as well as the latest iOS. A restart of the spotify app as well as a complete reboot of the iPhone did not help. 

Please see attached pictures. Gentlemen is listed on Mac and iPad but not on iPhone. 

Thank you for your help in advance.

Hendrik