BUG? Solving intersection lines between two breps

Hi there,

I am trying to solve the intersection between two breps, they meet perfectly in the centre (it is pretty much two exactly the same breps rotated 90degrees about each other). The issue is GH doesn’t seem to be solving the intersection. Hopefully the images explain the problem, what I want to achieve is 4 curved surfaces that meet at the centre point.

Am I doing something wrong?

Matt