DoN's 3D-Pathfinding / Flying-AI system (with full source!)

How to make an actor fly randomly, and when a player steps into range, fly to him?
The game freezes and hangs whenever the random destination location has collision.

There’s a variable "Auto Correction Guess List” in the DoNNavigationManagerVolume which I have a hard time trying to figure out. I think it can solve my issue.
Can anyone point me in the right direction?