Party was fighting Suulo we get him down to half health and he teleported into the wall. So no second chest for us. Submitted a bug report and took screenshots while a dedicated ooze kept trying to get to him. No clue what made Suulo head into the wall as we fight him in that corner all the time.
We tried everything to get Suulo back out, destroyed the portal beside him, Intimidated him, led orthons over to the pudding and got the pudding killed. Nothing would get Suulo to port out of the wall all he would do is jump and shoot lightning at people from inside the wall. Really sucked missing out on the second chest.
I guess this is Suulo's way of keeping his chest.