GH-AC beam profile stretch bug

[mikas]

I have scratched the surface of this AC+RH+GH connection tool, and I love it.
Just wanted to share a bug (I think it must be) so the tools can get better over time.

(Mac Rhino 5 WIP+GrasshoHopper+AC21 INT)

A beam profile gets stretched for no obvious reason. It has happened with several profiles. Last time it was "C-section lipped". Sometimes it works allright (like with "universal column" in the lower quarter at right), but I cant figure it out why this happens.

Please see pic attached.