It seems that the loop outside loop is not stable in the latest version. Its exclusion logic does not make sense. What’s happening?
https://dl.dropboxusercontent.com/u/12398274/External%20loop%20failure.mp4
Never mind, I guess the triangle was too large. It’s still strange to see the other triangle becoming sometimes visible though.
It depends on the proportions of both cut segments. Move the lower point up a bit and it should work again.