Game Mechanics: mob ghosting

[Itchybottom]

There is a lot of mob ghosting in west karana for me lately, I've been sitting next to the tree where the hill giant pops somewhere due east from the ogre camp and a lot of times when I target the bastard, and hit my pet attack button, it pauses a moment and then he vanishes. Then I end up running all over in a circular pattern from the ogres, to the inn to find him, and he ends up ghosting two+ more times. Has mob location updates changed recently to induce this?