Thackeray's Scavenger Hunt - Not loading

I've completed the War in Kryta content, but before the update I was still able to access this mini-quest, but since today's update Keiran is gone. Will I still be able to do this after doing Hearts of the North? Or will not having done it have an impact on the story somehow?

"Fixed a bug that allowed Keiran Thackeray to appear outside the Eye of the North immediately following the War in Kryta"

http://wiki.guildwars.com/wiki/Game_updates

Maybe this is the reason.

If you have completed the WiK content, then you no longer need the Scavenger Hunt. At the end of WiK Keiran is missing and shouldn't have been standing outside the Eye. That is why it was a bug.

That's kinda stupid. I waited with spending time and money getting the items I needed, because I needed it for my HoM and thought I'd do it when the questline for Keiran would continue as he just stayed that, assumed it was normal to happen. What a waste.

Use them on another character.