The original menu was built for mobile, where this isn't much of an issue, my re-creation is a bit weird because I primarily interact with it on desktop, but I followed the same ideas as the original.
For a desktop-specific version of this, I'd definitely allow it to persist open after a single click. Maybe I'll add that.
The drag doesn't work on my android phone - it just closes. And I'd argue the usability is worse on a phone, where how you're holding the phone, and screen size affects basic usability to start with, and small screen size makes it more important to be able to lift my fingers to see what I'm choosing from.
For a desktop-specific version of this, I'd definitely allow it to persist open after a single click. Maybe I'll add that.