Aggro mob jumping to player, pathing bug?

[DragonStar]

If a player is close enough to an aggro mob on the map to be in aggro range but far enough, but not too far away in walking distance from it because of obstacles, the player would get aggro from the mob, but rather than moving to the player, the mob would stay still, or jump to reachable spots next to it as the player moves in an apparent failed attempt to find or take the correct path to get to the player, and not long after would jump to where the player is.

[Naraka]

Saw this tons in the crypts.