Half of the time the que bugs out and launches into a cleared instance. Takes quite a while to reset off an cleared instance. Only way around it is to start a private match in another instance.
There really needs to be a join new option on the pve que, this might help with some of the problems. Getting tired of sitting in que for 7 to 10 minutes only to get tossed into a cleared instance then trying to reque only to get the message that you are already qued which your not but the system is locking to a cleared map.