Looks like you’ve configured your library to prefer embedded metadata from tags within those music files. Apparently your embedded tags only list an Artist, but no Album Artist. If there’s no same-named artist, Plex (and other apps) depend on an album artist to determine which tracks actually belong to the same album.
Imagine you have dozens of “Best of” / “Greatest Hits” albums and Plex will accidentally treat them all as the same release.
Long story short…
Solution:
Correct the embedded metadata to include an album artist for those compilation / various artists albums.
It might also be beneficial if you review the album title… audio files have a separate tag to identify the CD# (otherwise each disc will be listed again as its own album).
Example
| Tag | Value |
|---|---|
| Album Title | De Foute CD 2021 |
| Album Artist | Various Artists |
| CD # | 1/3 |
[edit: here’s some additional guides on required embedded tags → [HowTo] Configure Plex to use embedded metadata (music)]
Alternative workaround (not a solution)
Multi-select all the tracks and select Merge from the context menu
Yet another option
If your files are properly named/organized… disable the Prefer Local Metadata option in the library’s advanced preferences.
