I believe it’s not the expected behavior since I add a few albums recently with song like the and no additional enries were created other than for the album artists…
Actually this only happened after I added an album only, properly tagged with MusicBrainz Picard.
Then Kodi creates an entry (“Little Dragon/Agge”) just because a featured artist song but under this entry is the full album, with all tracks and not the only single song. On the regular entry “Little Dragon” is the album too, but only the featured artist song lol
I tried my best examinating the taggs on MB Picard, comparing with similar cases and there’s nothing unusual, I can’t see why this happened.