Guild Wars 2

I’m missing at least one episode in this chapter, making it impossible for my character to craft the back piece before mawdrey. Why is it missing and when, if ever, will it be back?

You can buy any chapters you don’t have u nlocked for 200 gems a piece. You can buy it by going to your Story Journal and choosing the episode you don’t have, and then buying it.

I have the chapter unlocked. It’s missing a specific episode in that chapter. There is nothing to purchase.

Chapter 4. The Dragon’s Reach, Part 2 episodes listed are:
Party Politics
Recalibrating the Waypoints
Taimi and the Asura
The World Summit

Something is missing. I completed this chapter successfully a few weeks back on another character. Where did the missing episodes go?