I’ll be adding the info in the next section of videos. You can unlock the door and then that 5th character that ran through can drop group. Invite 4 other characters and the click on the lost cat toy allowing you to complete on that new group without having to have done any of the monocles. This works well for additional teams you want to add.

I chalk up this mechanic as the same as unlocking a skip in raids to the last boss.