I still have the issue it's my ~ 20th try. I cleared the complete instance for several times now, in different order etc. Before finishing the event, after finishing the event. I don't have any workaround left ...
Guys, i don't want to destroy your hope. But this is kinda scary.. the bug seems to be there since forever.I have the other issue with this quest, i finished it totally and can't talk to Tonn.