Tora Quest Monsters death in the Moment of my dead Portal disappeared and no Quest Reward

I was the Groupleader and wanted to do my Tora Daily Mission with a Friend. In the Moment I died he slaughtered the last Monster for the Quest. I choosed Resurrect at checkpoint. The result was that my Portal vanished. I got no opportunity to get the quest completet respectively got no reward.

Thanks for your Attention

I'm the friend who made this quest with Kanos2014.
I didn't know of any bug like this, else I hadn't killed that last mob in that moment.

Here is a screenshot from my point of view:


I probably could had turned in that quest, but I waited to get this action (writing forum thread) finished, and in between I disconnected -.-
so I don't know whether I indeed was able to turn in that quest or not...