I agree 100%. I just did a quest section 3 times and I always got disconnected at the final bossfight. Incredibly annoying. Please do something about that arenanet! Either just let us stay in the instances for a little while or let the game remember our progress within an instance. Maybe, if you reenter an instance after a disco, you could let the player choose if he wants to play the storyline from the beginning or just resume from where he got to the last time.