This was working as expected when the trimmed surface was created with a pipe. For some reason, it is not able to track the edge curve when the surfaces is lofted, which makes no sense.
When I bake the curves and build the circle in Rhino, the result is as expected.
What did I miss?
I tried rebuilding the curves but that didnt help
CircleTT_2020May05 001.gh (10.8 KB)