I was doing the Mordrem events in Diessa Plateau. I managed to get to about 9 or 10 stacks give or take but then disconnected. I then logged back in and had no more stacks but I continued to do the event thinking I’d still get the extra bonus chest as it was my first time doing the event in Diessa Plateau. I made it up to 6 stacks before it ended and I did not receive any chests at all.