An odd one - album only shows when I find it via its tracks

So, I have a box set of Sviatoslov Richter.
When I search for Richter, or the album title “The Compete Album Collection” roon only shows me one album, which is one CD’s worth of content of the 10 CDs:

But if I go to track view and search for artist Richter I see the rest of the tracks in the box set:

And finally if I click on the associated album, I get the same album info etc but I get all of the other CDs in the box set.

Usually if Roon is confused it shows me multiple “albums” each containing some of the tracks. In this case it doesn’t show me any album indication of the other tracks unless I find it via the track listing and click on the album…