I've been using this set for multiple years at this point on my frost warden and had no idea I was missing out on damage from it being bugged until I saw one of the conversations about this.I'd love for it to be fixed.
Nope, because you have a very clear (and cool, I might add) visual indicator for the area... You can actually see if you're in the radius where you get pulled or not.
How it works on Live is that someone can gap close someone away from you, sprint towards you and pull you because it considers pullling player's position rather than a static one.
This is very prone to positional desyncs because the servers have a hard time figuring out actual player locations, hence why dawnbreakers and other AoEs can miss point blank, why you often can't land abilities on someone running around a pillar even if they're in your range etc.
Think of the new one as Dark Convergence, just different proc timer/visual.