Lunchbox Srf UV wrong in GH1.0 Rhino BETA

Above image is in Rhino 5. Below is strange behavior in Rhino BETA.
I offset a rectangle and use it to create diagrid with the Lunchbox component. Somehow in BETA GH1.0 the UV domain extends beyond the boundary, while GH 0.9 handles it perfectly for me. Thoughts?