Guild Wars 2

I was able to finally finish the story line. You have to wait upwards of a minute for one of the Sons to walk closer to the pen gate. When I waited for him to walk closer, then open, he instantly became targetable. I guess if they are too far away from the gate they don’t realize you’ve escaped, even after you kill all of his allies.

In the Story Line for the Norn, “Shape of the Spirit”, you are tasked to escape from the Minotaur pen and kill the Sons of Svanir. The only problem is one of them stays green, and cannot be attacked in any way. I have killed all of the other Sons and explored the entire instance. There are no other Sons, save the still green one, and no way for me to advance through the story. I have restarted the instance 3 times now, and still it happens. Any tips on how to move on?