Weird roofGable behavior on square shapes

[LR]

I'm having trouble getting gable roofs to work on square shapes. See attached images. In CE 2015.2, when you rotate the scope by 90°, the roof turns flat. If you rotate it by 270°, it turns into a pyramid! In CE 2016.0, the roof is messed up no matter what. This can be "fixed" by making the shape slightly irregular, but is that expected behavior? Seems rather strange.

[CherylLau]

Thanks for the files.  Now I understand what you mean.  Yes, it does seem like there is a bug when putting shed roofs on shapes created by splits.  Thanks for helping us find this one.