I notice this problem with lasso tool when try to isolate some areas of mesh, but instead that the lasso stop at some point of my selection. When i moving my cursor still showing the angle numbers, but the green area which showing selecting perimeter not work any more.
The lasso tools have a limited selection time I believe. All of the lasso tools have this effect. Sucks, but eh.
Yes, indeed. It is strange behavior of lasso tool, and for me this ruins the whole idea. Thank you for your comment. It seems that nothing can be done.