When attempting to fix songs, some of the settings configuration changes will not save and work in the latest version.
Here is a list of the ones I have personally found to be an issue, based on the tab they are on:
Save Tab
- MP3 Metatag Version
- Save songs so they work best with iTunes
Genres Tab
- Genre (never replace, etc)
- Genre Max No
- Grouping
- Grouping Max No
Match Tab
- Preferred Release Countries
For reference, using the Official Docker image on Unraid