Run behavior node causing problems

I am creating a common behavior tree for all the enemies in my game. I am giving all them the ability to chase the player upon spotting him. Then for each different type of enemy’s behavior tree, I will give them their own unique behavior traits. The swarm enemies I have spawned in are not always chasing the player. They randomly switch between chasing and patrolling.

When I kept the vision check and stun nodes in the swarm behavior tree, I did not have this problem. I have included a picture of the previous behavior tree.