Because te example A Fail? ( Loft)

Grasshopper
1

The attached picture show two example of loft from 2 curves. Because the example A (with offset curve) fail?
It’s a bug?
Ciao Vittorio

2

Hi Vittorio, try to flatten the curves in the “C” input of the loft component. The original curve and the offset curve are in different tree branches, so the component doesn’t know you want to loft them toghether.

3

Thanks Mire for your help
Ciao Vittorio