Lolz I've manly experienced this in locking games in Numa, not sure if on any other map cause its mainly Numa ive been farming tonight.
Ok so i type in my password then I enter the lvl, at that point it tells me the password is invalid and I get kicked out of my own locked game back to my avatar home screen.
Then if I try to do it again it might work or it doesn't.
I know once I'm in my locked game and I've completed it, only to try re-making it with the same password, it kicks me out again back to my home screen again.
Very weird.