[Help with zigzags on thin (single line) bridges]

Oh, I am using Cura 4.11.0

[Help with zigzags on thin (single line) bridges]

 

Not sure whether this is a bug, but I am trying to print a cylindrical "brush", where there are lots of single line bridges radiating from a central cylinder. Many of the bridges look great, but there are lot that are getting sliced into multiple lines, perhaps as though they're trying to get filled in like a top surface.

 

 

I've tried lots of settings, some thoughtful tweaks, and lots of flailing. I have successfully printed a very similar model in the past.

 

Attached screenshot, cura project, and here's an onshape link to the cad project.

 

Any idea what I'm doing wrong? 

CE-brushv3-2.3mf