I am having an issue with Plex Media Server 0.9.12.19.1537-f38ac80 on Ubuntu 15.10 (64 Bit) where some Albums are not showing up. Edit The tracks are erroneously included with other albums with similar names, typically with only digits diferring, e.g. 'foo bar vol1' tracks will appear 'under 'foo bar vol2' and the album 'foo bar vol1' is not listed.
As per my post and discussion at https://www.reddit.com/r/PleX/comments/3tkres/some_music_files_not_showing_in_plex_cant/
So at this point I have been using Plex for about a year. The server is running on Ubuntu 15.10-64 bit. All of the media folders in use are set with group 'users' which includes user 'plex'. I have had several music albums where none of the tracks would show up in Plex, one that I was able to fix and now several that I cannot. I don't understand what the problem is. The albums show fine on MiniDLNA server running on the same box (which also runs as its own user in the same group) so it is not a permissions issue.
Album 1: purchased from Google Play in 320KB mp3. Would not show up. Tried running tags through MusicBrainz Picard (as I usually do), no change. Adjusted file names using kid3 (to match filnemaes to id3 tags and check for illegal characters) no joy. Eventually transcoded from mp3 to mp3 and the reencode showed up. Only album to this point I have ever experienced this with.
Album 2: Adele's 25. Initially obtained this in mp3 format. Wouldn't show up, or rather it would briefly during a scan but then it disappeared again. Tried fixes as for Album 1 above but no good. Could access album via miniDLNA server and play it fine, ditto VLC. Got album again in FLAC. Still would not show up. Tried filename adjustment as above. Tried reencoding from FLAC to ALAC and back, no joy. Changed folder name before rescan. Tried rencoding from FLAC to WAV and back, no joy. Same as with mp3 version.
Albums 3: Today I have added a 10 album box set of Erik Satie to my library but only 3 show up. No obvious reason why only these three do not.
I looked in the logfiles for Plex soon after adding them and it could clearly see the Adele files but it doesn't want to add them to the library and I cannot understand why. I can't see the Satie albums from the box set 'complete piano works' now although I do see lots of older files that have been in the library for months.
Edit: So, as /u/4ndreasH pointed out on Reddit- the Adele tracks for the Album '25' are showing under '21'. I also have the same issue with an Erik Satie box set where the tracks from missing albums are incorrectly included with other albums. Seems to be an issue where the artist name and album are the same bar some digits in the album name. Now that we know what the problem is perhaps we can work on getting it fixed or find a workaround.