Losing active target?

I've been away from GW for some time, I came back and started playing PvP, but there's something I don't really recall from before - when I pick a target with my warrior and attack him, the slightest body block will make my character stop attacking and just stand there. Same goes for activating attack skills, an activated attack skill will "pull" my warrior to the target, but the simplest obstacle will cancel the skill and stop me again.
Has it always been like that?

I'm almost positive it was for PvE only. If you've done a recent IDS run the Guiles follow you forever. Now, I think they have normal aggro distance. I could be wrong though.

Edit: And I'm pretty sure its always been like that.