Bug?: languagesystem musi feature should probably be "musc"

If you have a have a glyph within uni1D100-1D1FF (Musical Symbols), when generating features, Glyphs adds the Languagesystems feature:

languagesystem musi dflt;

Should that be “musc” as shown in the OpenType spec?

The feature is generated even when they’re not set to export. Is that what you want?

Glyphs 1.3.19b14a (483)

I fixed that. Thanks.