not to wake a zombie up, but there still seem to be missing Musicbrainz releases (or versions of releases).
The LateNightTales series seems like a bit of a repeat offender.
In that specific case, it creates a problem because there’s a one-track difference that makes Roon unable to recognise the international one…
EDIT: seems like a metadata problem on my side. Because that set of releases is tagged as “various artists” in the files, Roon doesn’t deem it necessary to offer the full list of Musicbrainz alternatives it would if the release were tagged to the compiling artist’s name.