Could you please add
<Tag id="Original Filename" id3v23="TOFN" id3v24="TOFN" wma="WM/OriginalFilename" vorbisComments="ORIGFILENAME" mpeg="ORIGFILENAME" ape2="OrigFilename" />
into the Configuration.xml
I have to remember to manually add it back in whenever you update the file.
If I use a custom tag, MB prefixs TXXX/ to TOFN and won't read the tags correctly