Automatic Metadata Cleanup

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Pretty sure the issue here is that the external tool is providing metadata and Jellyfin is searching for its own, so adds additional metadata to the folder. You can likely configure your external tool to serve metadata in a Jellyfin-friendly format and configure Jellyfin to not search for/add metadata. This is how I have things set up and it works flawlessly aside from a few items that are difficult to identify through the standard DBs.