Guild Wars 2

Over the last few days Capt Edwards stop her progress. Some have mentioned the centaur invulnerability may be at fault.
Any idea from Anet when they may address this?

Stopped where? If this is the npc for the Modniir Ulgoth, then she has to run from the camp to the Southwest and if no one kills the npcs in her way (usually some rock dogs that spawn by the road) then she will stop to fight them indefinitely.

In rare cases the invulnerable centaurs do not flee fast enough and attack Captain Edwards instead. The invulnerable effects do expire though.

^ this. The problem appears to be happening more often than not lately.