"Subtract" operation sometimes cannot subtract shapes made with the Oval tool

[Horseflesh 9]

I was trying to punch holes out of a shape, and noticed that I was able to subtract shapes made with the Rectangle tool, but not the Oval tool. 

The problem happens 100% of the time if I am trying to subtract from the specific shape in my sample file. (That particular base shape was the product of a random SVG download and then a handful of other binary operations.)

If I draw a new primitive shape, then I can subtract ovals from it just fine. 

This is happening in Designer for Windows version 1.7.3.481.

 

 

binary ops bug.afdesign

[dutchshader 475]

the ellipse was subtracted, only the fill mode has changed.

[Horseflesh 9]

Ok, thanks. Never thought to check that. 

It seems strange that those rules would change as they did. Squares work one way, circles another? If that is intentional it doesn’t make sense to me.