As I said, I don't know what is triggering this behavior. Most of the time I see him patrolling with 1-2 buddies as usual and they're easily avoidable. But it happened (twice or even 3 times) that i was minding my own business in the area SW of Harro, outside his patrol route, then I see him homing on my toon like a ballistic missile from way beyond horizon.
It was not the regular behavior when he's patroling, he agroes you, then he sprints to attack. No. He was just homing on me at maximum speed.