Rhino 5, installed Flamingo nXt 5 and sectiontools sections disappeat in renderings


I use a lot of sectiontools and Flamingo.
I installed new Flamingo version 5 into my Rhino5.

Now when I make a section to my object and render it the section is still in the rendered image.
I mean the object renders completely.

So the section works normally in Rhino but not in the Flamingo render window.
What can I do?