Yesterday I was doing King's Fall with 5 other people, one of which was lagging so badly he was forced offline multiple times, and didn't get any rewards when we beat the Warpriest. So we waited for him to come back at the gate to Golgoroth's Cellar, and he made it back in a couple of minutes. Right as the text for the Cellar popped up, my system froze and I had to manually reboot it, send the error message, wait for it to reload, yada yada. To my surprise, when we went back into King's Fall to try and complete it, we found that the game had skipped us past the Golgoroth encounter entirely, right to the sisters. We essentially lagged past a boss. I know in the past weird things have happened with raids, but this is by far the strangest thing that has ever happened to me. And I helped push a time-bending robot of a cliff with a solar grenade.