Comment 1 for bug 1752697

I cannot reproduce this bug. Tags are not exported unless the the config option is enabled. I'm always able to restore the metadata that is present in the file with Metadata > Import from File Tags. Please note that missing fields in file tags are ignored during import and do not overwrite the metadata managed by Mixxx. The file tag must contain an empty/blank field to clear the corresponding field in Mixxx.

Did you execute Metadata > Export to File Tags before modifying the metadata? This will mark the track for metadata export regardless of the config option. If you afterwards modify the metadata again before Mixxx got the chance to update the file, those changes will be exported, too.