Plains: Matchmaking set to anything but public, but pubs are still able to join

[-CM-Peepsqueek]

We were setting up for a trio Eidolon capture and it was just about a few minutes before night. We then decide to go into plains early with only 3 of us in the squad then we'll just invite the 4th once we're in so that way we can start setting up like lures and stuff but then a random frost comes out of the gate. We asked him if he could leave because we were about to do Eidolon capping and he was just as surprised as we were. He said he went in the plains to fish and had his matchmaking set to 'Solo'.

I've also had a couple other clannies encounter these where they set their matchmaking to 'Invite Only' but still have random players join in their squad.

So far I've only seen this happen in the Plains and not on normal missions.

Additional info: I don't think we did the whole go to Cetus and activate the bounty for trio capping but I don't think it would matter since the host's matchmaking was set to not be public.

Edited February 12, 2018 by -CM-Peepsqueek
Additional info