4.4 audio export of separate parts

I think I saw something in the release notes about instruments from the full score being played even when editing a specific part. This sort of makes sense (though I can also see it being annoying in certain circumstances), so you can just see the part you're working on, but hear everything.

This however seems to have introduced a new bug, in audio export, as when you export a part as audio, it plays back the part... and includes all the instruments, even if they're hidden in that part.

Currently to export a single part as audio you need to solo it in the mixer, but that's not practical if you're exporting multiple parts at once, from a large score...