Group was ported out....
He was likely the person who started the instance, so when he left, it takes everyone out of his instance.
http://youtube.com/user/Royblazer
Surprise!
Sera is correct. If the party leader leaves the party or is kicked out, everyone is forcibly removed from the dungeon.
Well that really sucks. Hopefully there is a fix coming for it, or is there a way to change leaders? I haven’t really played around with it.
Same thing happened to me today. Was doing AC in Story mode at the end boss and we nearly had Ralena down when everyone died and she reset and started regenerating her health. Suddenly we all get booted from the dungeon. Turns out the instance leader rage quit because he couldn’t be bothered with it and bad luck to the rest of our group. It really sucks that we can put in all of that effort and it’s for nothing just because of him.