Dispersion Rune Bugged?

Hello,
So I basically did the quest all the way to loot the water from Zul’Kunda fountain, but when I was going to click it, mobs spawned and I had to kill them first. After doing that, the water had vanished and I couldn’t loot it anymore. Tried abandoning the quest and get it again, but it sends me directly to this last part and I can’t loot anything at this point.

Help?

Did you have 2 active meditation buffs when you clicked the fountain?