I created a .fsm file to test the AI formation restrained.
I placed a AI group and a player on editor-map an start my .fsm file for each AI units init line.
The .fsm order doStop and give each unit a new position with doMove.
I created a Sign_Arrow_Blue_F at the new positions, to show that new position.

If you start the mission you can see that the AI move to the new posiotion, but if the AI reach the position, the AI says "ready" and move back to the leader and insert it into a formation.
There is no doFollow given.
{F23056}