Cant seem to Stop Behavior Tree

Hello, I cant seem to stop the logic of my Ai’s Behavior tree. Ill post a screen cap of this. mainly the reason i want to do this is so that after the player get far enough away the Ai stops moving and my lack of knowlege of behavior trees is the only thing stopping me from doing it in the tree its self. If anyone knows what the best thing to do here is please let me know, whether its better to do this in the tree or in the actor its self. hopefully a simple question.

Easier to make a state of inactivity (idle), and manage it from behavior tree service. Start/stop of the full tree will be too costly.