Ahh, okay. Awesome. Found it. I’ve set it to Placed in World or Spawned. No change though. 
I did look into how to see the nodes firing during runtime, however there appears to be nothing in the drop-down list to debug. The only option is ‘no debug object selected’; even if I select the Base Enemy Blueprint in the scene. 
EDIT: Okay, there is an enemy to debug, but only in the Base Enemy and Enemy Controller. Nothing shows up for the Move_Randomly_Task Class or the Behaviour Tree.