I have noticed over the last few weeks since the overhaul that if a player leaves Castrum Meridium or the Praetorium the queue never automatically puts a person into the dungeon if it is in progress.

A player may still join directly, if they select the dungeon in the case a member of your FC or a friend join. (Gaining 20 commendations for the final kill)

However Duty Roulette's 80 bonus cannot be gotten or joined for that matter if it's in progress, it merely puts you into a new queue at the start of the dungeon even if there is a space to fill.

Not a major bug persay, but it is nice if someone bails that the group has a better chance of completing it instead of being a man down.