Grasshopper + Rhino Beta -> Whats happened to NGONS?

Hi,

I have two lists of polylines, and from those lists I create ngon meshes.
After Rhino Beta installation something went wrong with display from Grasshopper.

If I create ngon mesh from one list of polylines display is correct.
If I input datatree, or two lists, meshes are still correct but display is only shown in wireframe why?

I think it has nothing to do with code inside, because baking meshes works well and they are valid, but multiple display of meshes with ngons result in wireframe display.

I can take those two  meshes and join into one, and display is correct again. 

mesh1.append(mesh2);

But it seems grasshopper cannot handle more than one mesh with ngons display.

Code attached.