How do you stop people joining Duty Finder?

[FeroXs]

As title says, for people who solo/low man extreme mode primals how do you stop people joining after everyone's left?

Or does simply pulling the boss do that?

[droned]

Have a group wipe until it's you and your buddy. Don't q for more replacements.

[bobdylan12]

For the first time today, someone actually joined my lobby. I was in garuda EM, the DF thing just said DF, no looking for members. I was the last one left I clicked cancel to look for new members, went on to fight about 5 minutes later some random person just joined. First time this had happened to me when I clicked cancel.