Round corners removing handles

Hi all,
Pretty new to Glyphs, but am running into an issue with the round corners filter removing handles from multiple objects. I’m trying to create an (admittedly weird) variable font, so I need handles on a few straight shapes to remain compatible with other masters—yet when I apply the round corner filter it not only removes the handles from the selected shape but also removes them from other unselected shapes nearby:

Not sure if it’s something I’m overlooking or not. Thanks in advance!

I can reproduce the problem and will fix it.