Glyphs generates twid feature but not qwid

I have a font which contains “one two three one.qwid two.qwid three.qwid one.twid two.twid three.twid”. When I hit the Update button in the feature panel, the twid feature is generated, but no qwid feature is created.

For the qwid feature, it was only looking for the .qartwidth suffix. I added .qwid.