´Unknown Composer´ although the composer is recognized correctly

While tagging and identifying the new TPT box set, I stumbled across some pretty odd behavior of roon regarding assigning a composer to a composition. As we can see, the composer named ´Bruce Soord´ is correctly identified and tagged:

That’s the case for all library and streaming versions of these tracks. But the moment I go to the composition page of let’s say ´The state we´re in´:

´Composed by Unknown composer´ and no connection to Bruce Soord with the tracks not appearing in his composition list as well. This stays the same even after removing and newly assigning the composer credit to the tracks.

Anyone had this problem before? Any solutions?

Interestingly, there is a guy (or gal) named ´Unknown Composer´. Most of the lost compositions can be found there, but not all.

@Arindal The problem is that there’s no canonical data at the Composition level.

This doesn’t mean that there aren’t composer credits at the Track level, which is what you are seeing, but we don’t roll them up to compositions because we’ve learned to our cost in the past that track level credits can be completely incorrect.

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Thanks, that explains it. May I ask since when track-related information or tags containing the composer´s name are ignored to this degree? When I started sorting out my classical library like 3 years ago, I noticed a whole lot of ghost composers like ´Mozart Composer´ or ´Wagner (1813-1883)´ polluting my library which obviously originated from such flawed file tags. That is not the case anymore?

Having no canonical data is a MusicBrainz issue related to the composition? Would Tivo/Xperi data fill this gap, if there is such data?

If I know it and all non-canonical compositions are credited to this one ´Unknown Composer´, it is at least possible to identify them and edit the compositions page by page manually.