As of this patch, I've also been having issues with Multiplayer assigned characters. I am the owner of the game and my brother plays with me. We've noticed that only during battle every once in a while the "character" ownership changes and I inherit control of his character and mine. The odd part is it isn't because he's crashed as he keeps control of Madora (he controls Madora and I control Jahann). It's just his PC that becomes mine. This can cause a crash where if I assign his character back during combat, when it's his character's turn again his diaglogue for fighting never appears and we get stuck in the combat.
