Each time I attend Heroic Battle on my barb, I die inside of the instance and have to do the one minute wait to be ported back in, via quest.
Each time that I take the quest, I wait for the 1 minute cool-down and once it gets to the final seconds..
00:03 ... 00:02 ... 00:01 ... 00:00 ... 00:-1 .. 00:-2
Then the quest disappears, and I'm not ported back into the instance. It doesn't matter how many times I do the quest, it will not port me back inside.