There's a bug that generally happens every time you try to move two characters into a different room at the same time, which some times makes the game bug out and causes them to permanently get removed from the whole entire game, and you can't even get them back. It for some reason still says they're hosted, which is odd.
(For Context, this is the exact room I placed Ennard in after I attempted to move him to it. BUT after removing one of the other characters first.)