I’ve noticed this personally a few times, I hit the “Friends Only” button (Specifically in Zombie Massacre) and notice the text saying “Note: Your Server will bla bla” doesn’t go away, even when unticked and reticked, and when launched, people join.
No clue how to reproduce this besides it happens sometimes, but after having it happen a few times, I figured I’d report it.
A work around of course is just be to back out of the menu and back in.