This is one of the areas where I think Roon can do a lot better. There are many instances in Tivo’s metadata where a song performed by an artist has composition credits and many of the same song performed by the same artist without any composition credits. As far as I can see Roon doesn’t conflate these even though there’s arguably a strong case to do so.
I suspect also that if an album is “unidentified” within Roon then an instance of a track performed by an artist is also ignored, even when composition credits are present and match those of other instances of the same track performed by the same artist within your collection. One gets the impression there’s very little intelligence / enrichment being applied to the data received from metadata sources.
Seems a similar set of issues to those covered here: