I just downloaded Roon on a 14-day trial. I started to play Haitink’s Die Zauberfloete, which was a 3-CD set before I ripped it to harddisk. In Roon, only discs 1 and 3 are shown. I have checked that the directory being used has all the tracks from the 3 CDs. The contents of discs 1 and 3 are correct, as far as I can see, and they play correctly. The issue is that the content (ripped tracks) from CD 2 aren’t displayed.
Setup: Win10 Pro x64; Roon 1.3 (build 209), 64-bit. The ripped files are in a directory on a harddrive attached to the system where Roon is running.