According to the documentation, the default fill color of the circle-stroke marker should be white. However, in my case, all circle-stroke markers are rendering as black.

I tried inspecting the source code and assumed the fill option might control this behavior. However, it appears that setting fill results in an attempt to render the marker as a polygon

It’s possible I’m misunderstanding how the fill behavior is implemented or intended to be used. Any clarification or guidance would be very much appreciated.