'Ruled Surface' problem

Hello everyone,

When i use 'Ruled Surface' component between two closed, hexagonal curves it gives pretty strange results (no edges?). When you zoom you can see that in the geometry itself. When using LUNCHBOX 'Unroll Brep' component you can see that more clearly.

It is strange to me that if I bake out of 'Ruled Surface' everything looks fine in Rhino. When you reference these polysurfaces and use 'unroll brep' you can see the diffrence.

It is baked from the very same component. I assume it should give same results but it doesn't. Why is that so? 

I attach grasshopper and rhino file.

Thank you for your time and help!