Most of the time it's in the Protector's Enclave, but also noticeable in other zones. Mostly, I notice it when my wife goes crazy because it's bugging out for her..:)
I would chat more in groups, but apparently the ingame voip has been disabled until further notice(correct me if I'm wrong...) and typing more than a hello seems pointless and very tough when I'm busy slaying multiple mobs etc...
Well, admittedly, there was a bit of a difference in lvls(we were all 3-5 lvls higher than the player), but we got the message "your party is waiting for you"(or something like that). He was trying to enter an instance like the sewers through a gate.