So I'm trying the rotobrush 2 and I had selected my subject's hair. As the tool propagated forwards, the line I drew over his hair started to snake along and "slide" down over the (camera) right side of his head (see video).
Overall the tool seems to have improved quite a bit! Tho I do find that it struggles to catch his ears. I have tried with several clips and even tho I made an effort to be precise with the initial frame, it ignores the ears as soon as it gets the chance. Hopefully you can work on these issues to make it even more amazing.
Thanks for letting us know about the refine edge issue you've encountered. We've recently made some improvements to the Refine Edge Tool but apparently it's still having problems with some footage. I'd like to see if I can reproduce the problem in-house. If possible, please send a collected version of your project including the source footage firstname.lastname@example.org.
James Landy Software Product Quality Specialist Adobe After Effects