Guild Wars 2

Trahearne barely finishes his sentences before starting the next one when walking around. Often even cutting the last few words away.
Not gamebreaking but it really ruins the atmosphere.

Trahearne is first encountered at the level 60 mission, Claw Island.

After claw island, there is only one more mission that is lvl 60.

So you have The Battle For Claw Island

and one of the three Order Missions as a potential

The Ghost Rite
Reconnaissance
Killing Fields

I would bet it is the Reconnaissance mission, since All of the NPC’s in that mission start talking over eachother if the player moves to the different locations marked on the map too quickly.

During Claw Island in particular, Trahearne likes to port around and interrupt himself a lot, if you don’t wait for his dialogue to finish.