Lokholar the Icelord despawn bug?

After escorting Lokholar into Dun Baldar, Horde captured the grave yard. Lokholar took out 2-3 alliance, then returned to the Dun Baldar grave yard flag with 100% health and permanently disappeared.

he do that wen there’s nothing to kill

You use him to break the turtle so you can cap the gy - thats it.