This is an interesting issue and not sure how solvable but I will try. This album includes two versions of the complete Diabelli variations by the same pianist on two different pianos. Roon shows it as a single composition, while in fact the right way would be to have the same composition twice. Is there any way this could be improved on or I could edit it manually?
Interesting observation! I wonder though if the problem is on Qobuz side only.
Technically he is playing a Fortepiano (first series) and a piano (second series), could it be that this breaks the Roon parsing of metadata?
On the Qobuz app the information is not shown in that form so I cannot validate.