Credits in AllMusic missing in Roon

I opened another topic concerning the quality of the metadata in AllMusic, and another identifying a bug in the export function and composition display in Roon - here is a third one…

AllMusic composition credits are not always displayed in Roon. I have about 25.000 tracks in my “local” library. Of those, 2600 have been correctly identified to a Rovi album (and song), but have no composer. So that is over 10% of tracks.

I was curious to see whether this information was missing from Rovi (AllMusic). I found many cases where composers were correctly identified in AllMusic, but simply not picked up by Roon.

Here is one:
And one more:

Is this a known “bug” ? Can it be corrected ?