I'm working with the Music API and I've started to get the hang of how relationships work, but it seems like they're broken in some cases.
I'm aware that library songs and catalog songs are different, but when I query me/library/songs?include=catalog,artists,albums there are tracks where the catalog relationship info points me to a catalog song but then the album relationship info doesn't have the corresponding catalog info. However, when I query catalog/us/songs/{id}/?include=albums for the same song I do get the catalog album info so I know it's in there.
There are tracks which don't have catalog info at all (which is fine as they're not originally from apple music) and there are tracks which contain all the info in the first endpoint and don't need the second at all. What's throwing me off is the ones that return some but not all of the data. Is this intended behavior?