A Split Party In Role-playing Game
It can also be difficult, for a groups leader to foster unity in a party.
Some, characters if role-played correctly, are meant to create friction, where there wasn't before.
I think one way, for the leader to get back a sense of control over the situation.
Is to remind the other characters, the importance of the current goals, and mission. Also, the consequences if the characters don't complete it.
Perhaps a timely reminder, that the hand is no more immportant than the eye, or ear etc. Put simply, the characters, need to find their synergy!