I've successfully been able to dodge the weights 100% of the time, but that's only by anticipating when its going to happen and start moving before he casts it. If I don't do that, then it's usually iffy if I'm out of it, even if I'm visibly out of the circle before the animation goes off. I have found that jumping after I'm out of it will force the server to recognize where I am, which can also help in dodging it, but they do need to fix this issue.