FLAC files not being scanned

[henrikp]

Using v5.13.1 via linuxserver.io docker image.
I can play the FLAC files just fine but

• no metadata info is being presented on screen besides the filename (VLC shows populated track/album/etc just fine)
• since there is no metadata being extracted, the file is only searchable when "File Paths" is selected under Search

FLAC does support metadata but is mStream supposed to retrieve it from those files?