[UlfSchmidt]

But I see these section headers and indexes everywhere, even without previously selecting any specific sort order. They are simply always there, everywhere but not for movie collections. That’s why I was and still am wondering why the App shows a different behavior here - even with your explanation in mind.

Talking about music roles: for the limited amount of entries shown here everything works, e.g. album selection etc. But in the meantime I found another strange thing here. For my Roger Waters albums, Mr. Waters is shown for each album as the composer, but only one Roger Waters album has any Composer tag? So this information must be provided from somewhere else then. And since I index my libraries only using the "Local information only" scrapers, I honestly have no idea where this information is coming from? It is even not part of the Music DB file, I just checked this again.

So, what is listed in Kodi's Music DB and what is provided via the API doesn’t match. The song_artist table shows much more entries than the App… So basically within Kodi, all the necessary information is gathered. Why it is then not provided via the API, different story!