A HUGE issue with the The islander quest

So when I hit lvl 34 as a Draenei warrior,I wanted to do the quest for berserker's stance.I took the quest The islander,and went to the island near Ratchet.But when I proceeded to take a chain quest after the Islander,to summon that Big Will guy,my game crashed.I relogged,and it crashed again.After the quest failed(it has timer of 5 minutes) I logged in again without any problems,but again I took quest and game crashed.When it crashes,I literally cant do anything,I have to restart my computer.I can still hear the music from logon screen but I can't do anything.It happened 5 times already and it's getting frustrated since I really want to do that quest.

Picture : http://imgur.com/a/PZmax

I can't do anything when this happens,please fix it for me guys

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If you're using the addon QuestHelper, stop using it on timer quests. It crashes the game and we can't do anything about it unless we fix the addon itself.

I use questhelper but the quest worked just fine...matter of fact,all timed quests work just fine.I had 0 issues.

Same issue, but fixed it by turning off addons

Issue is really Questhelper...same bug i was get in durotar with timed poison quest and timed in crossroads. Now i use Carbonite, and everything is okay.