I think one of the groups was either 1) hidden directly behind another group or 2) moved off screen. When I kill a world boss with a full 40 players I am only seeing 7 groups. I tested this by sorting by group & role, where I am seeing all 8 groups, then going back to sorting by group only and only seeing 7 groups. How can I get the 8th group to show up when it has gone missing? Thanks!