I am seeing it even in single player mode. I suspect it is the latency issue between the server and the local hosted game. It usually happen when latency hit 500ms and above. There also appears to be packet drop and retransmission, i sometimes see my character magically appearing on places which i have just passed.

Not sure if it is blizzard or TMNut fault, i am inclined to think it is TMNut next generation network issue. Anyway, it is not game breaking, just annoying. Does the peeps with Unifi experiencing this as well?