I'm seeing some unexpected behavior related to the latest fix (guest artist.)
I have this title
Johnny B. Goode - Take 2 (feat. Orianthi; Lindsay Ell; Cam; Troi Irons)
I run the extract featured artists preset and all four featured artists appear on one line in the artist splitter. It doesn't matter if I use commas or semi-colons to separate as the result is the same. I can PM a link to one of the tracks if that will be helpful.
EDIT: Tried with MB versions 3.3.7357P and 3.3.7354 P. Same result.