Was doing the achievent in Pandaria last night, where you need to do some of the scenarios on a Saturday. Got in to Crypt of the forgotten king, finished the first part, went to cleanse the pool but the Essence of hate just keeps spawning and I get stuck. Have tried on hc, normal and with a friend and same thing happens, they just keep spawning instead of the pool being cleansed.
Thats no fun, but you need to tell Blizzard about it, not the forums.
From the support screen in game, click the TOP LEFT button labelled “Submit feedback or Bug report”.
You won’t get a reply, but they assure us that all bug reports are read.
I did. This was more a “there is a bug” if anyone else tries it. Last night I googled a lot but didn’t find any info. Maybe this will help someone else.
It’s definitely bugged. I attempted this today and couldn’t get past stage 2 as well. Not only did the adds keep spawning, there was no progress bar to show how many I to kill.
I have raised this as a bug in game as well.