I do not know when this problem began, but it has become a major barrier to progress. The AI is happily running through its tasks when suddenly all items inside the tree fail and all blackboard variables become false. I do not think the services are running either. This happens at random times. enclosed are the pictures of my code.
Well, I think I have fixed the problem. When two specific tasks (Stalk and Chase) were false at the same time, the AI could not move on to any other tasks because they are false and outside of the specific selector.