Black objects on rendered mode when using Boolean2Objects

When I use Boolean2Objects the render in mode “rendered” in Rhino WIP is black, not in Rhino 5. I used the last version of Rhino WIP (6.0.16194.9151, 12/07/2016). I just used a box and an sphere.

Hi Laurent - and before the Boolean operation, it looks correct?


I am no more on my PC but I am quite sure it was good.