how to reduce the time waiting on the behavior tree nodes?

hello, i’m working on the AI for my game using the behavior tree, so far it is working fine, it still needs some tweaks, but i have one question, in the time 1:59 of the video the zombie has reached the player and it will attack him, my behavior tree service is checking any 0,15 seconds the actions that the zombie will need to take, but in the video show a wating time of two or more second to let the zombie attack the player, there is some way to reduce this wait, is normal that behavior or i have any node that create some delay on the response of the zombie?

if you need to see some screen shots from the behavior tree service i can upload them, i’m only asking if this behavior is normal or is some behavior created be mistake in my AI flow.

thanks in advance for the help.