I understand that leaving / getting kicked from a group while inside a dungeon or trial removes you from the area. But why when I'm questing? I was in the dreaming cave portal in artaeum when i made it finally to the summit. My friend left the group we were in (he was not in the zone with me) to join other friends, and a timer started to kick me out. I was at the last phase of the quest and I had to kill everything and do the whole area over again. Why does this happen? Is it a bug? It's very annoying, it happens in a few areas.
Best NB NA