Various Mobs resetting ?under the world?

[Leani]

An expedition guard
A Chetari Guard
Vores the Hunter

I've died (multiple times) to these mobs, and when I return to their spawn point, they are not visible. In the case of the Chetari and Vores the Hunter, they immediately appear and attack me when I get into range (Vores is KoS the Air Elemental illusion). I can target them with the "/target An expedition guard" command, but not tab-targetting.

An expedition guard is where I am sitting right now. I can cast spells on him using /target, and when aggroed, he suddenly appears, running straight toward me.


Approximate /loc of each:
An expedition guard -5130, -3015
Vores the Hunter -6908, 513
A Chetari Guard 100, -1600

I'm assuming this is not a bug limited to these few mobs, but these are the ones its happened to me with. It always happens just after they've killed me and reset.