When I imported my library into Roon, I noticed something weird. Every multi-disk album I had was listed as “Unidentified” and I had to manually match the album. Every single one, and I have such obscure titles as The Beatles’ White Album and Pink Floyd’s The Wall. Seriously? Your software had problems identifying The White Album?
And, when I matched my tracks to the White Album release I had (the 2009 remasters), each track had in parentheses “(2018 Remix).” How does the 2009 release of an album have the 2018 remix?
I also ran into this and recently fixed a few and left some others alone. This KB article and some testing got me on the right path. Not a direct answer to your question but maybe gives you some ideas if you wanted to move things around on the file system to help Roon out.