This seems to be a bug, I'll try to figure-out what's going wrong. I suspect it is the result of the 180 degree angle somehow though.
You can prevent this problem by using normal (bezier) points to make that shape which is much better at handling such shapes.
You can do that by changing the band circle points into bezier ones through their property dialog (press enter while a circle is selected).
You can prevent this problem by using normal (bezier) points to make that shape which is much better at handling such shapes.
You can do that by changing the band circle points into bezier ones through their property dialog (press enter while a circle is selected).