Discsubtitle

I’ve been using beets for a while now and it’s a fantastic way to organise my collection, however I’ve noticed that it’s not writing the DISCSUBTITLE tag from MusicBrainz. I’m having to grab this by re-tagging multidisc releases with separate disc names (discography boxed sets etc) in Foobar2000 aftwerwards. Is there an obvious config setting or plugin I’m missing?

Hello! Just checking, does beets’s $disctitle tag contain the information you’re after? Or is it something else?