I've tried to play several audio disks. It works, audacious plays songs without a problem. Only when I open an audio disk in Files, it only shows 6 tracks there, although there are more. Running the command
ls /run/user/1000/gvfs/cdda\:host\=sr0/ reveals all the rest. I can play these "hidden" songs using a terminal command.
What's wrong with the Files and how to fix it?
For some reason when you mount a CD and open this newly generated gvfs without much waiting, Files shows only 6 tracks, but then, when you simply refresh everything appears. Or when you instead of opening the drive directly (initiating mounting and opening without any pause in between), select to mount and wait for it, you won't face this problem.
Not a critical bug at all. However, that was totally unexpected even though I've been using Linux for years already. Breaks UX significantly.