Guild Wars 2

Hello! Recently I’ve been trying to accomplish the LS story achievements. A friend did it in a story instance with one of their friends, and received credit. However, every time I have gone through to do it with someone else, in their story instance, I have not received credit.

Is this the way it’s supposed to be, or a bug? Or is there something I’m missing?

I have already completed the LS, and it is indeed on achievement mode.

Solved! I had to activate the story under the LS tab. I thought I was replaying it naturally but I had to hit the button!