Bad AA on Circular Sectors with some angles

Hello!

I have a Disc component with Circular Sector type. Antialiasing is On and works very nice with different angles. But for some specific angles one edge can have Jaggies. Looks like this happens because of bounding box calculation in the shader. I can cut it out and AA works good, but I don't want to :-)

May be it can be tuned for respecting antialiasing?

AngleStart 0

AngleEnd  90 :

AngleStart 0

AngleEnd 181:

(Result depends on radius)