The problem seems to be that your sketch contains a spline. Try generating the shape by projecting the 3d sketch onto a plane and then generate the spline shape using multiple arcs. Then I projected the the top view shape onto another work plane and used it to cut across bends.
The problem seems to be that your sketch contains a spline. Try generating the shape by projecting the 3d sketch onto a plane and then generate the spline shape using multiple arcs. Then I projected the the top view shape onto another work plane and used it to cut across bends.