Guild Wars 2

I have run the Ruined City of Arah (Story mode) before, to help other people finish their personal stories. I finally ran it today for mine and encountered an annoying bug.
Before, at the end after defeating Zhaitan, I got the big reward chest that had the final item and some money in it (this was probably over a year ago). Today, I complete it, and I get the “bonus” chest, which had a few silver in it, but nothing else; the big chest still on the deck yields nothing else, no Shards of Zhaitan, and even the Gilded Chests collected throughout the dungeon only yielded masterwork level items (with an MF of 118%).
The question I have is: is this intentional? I know I’ve run the mode before (for someone else) but it was a REALLY lackluster reward, and even the “Victory or Death” reward is fairly lackluster.

The champ boxes only have rare chances to drop things higher than masterwork quality, and MF doesn’t affect the contents of containers (such as champ boxes).

As for the rest of the reward, the reward for Arah Story is exp, karma, the class-related level 80 rare helm, and 50s. You should get the 50s reward, exp, and karma every time you run it for the first time in a day. The helm is a one-time only thing, and the shards (3 of them) I think only drop from a random boss in the dungeon. And that big chest on the deck is the same one from the objective you did before killing Zhaitan; so it won’t have anything in it at the end, unless you just didn’t get your loot from before.

You don’t get your main reward (the pact token, guild influence letter, siege blueprints, etc.) until you do the follow up story at Fort Trinity.