Nucleus, Eero
I went to the ACT website to see what new albums they had. For each, I went into Roon and searched on the artist, have several albums but the new album was not found. When I searched on the album title, it was found. After I added the albums to my library, they were always noted under the correct artist, so it wasn’t a problem with spelling or anything like that. They play fine.
I added four albums, I added Quboz versions but all of them also have Tidal versions so it is not a problem specific to the Tidal catalog.
Artists are Majid Bekkas, Wolfgang Haffner, Andreas Schaefer and Matthieu Saglio: