lv50 quest "An Eartquaking Sound" - Cyclops disappearing

so the mission is to kill 2 cyclops. the problem is i approach them and start bashing away but then about 5 seconds later they stop moving then disappear across the area, resetting them.

This has happened around 10 times and the 1 time i was able to keep it from resetting it pounded my ass. i have 120AP and 115DP and within 2 hits i am almost dead and feel like i was not putting a dent in it at all

 

This has been reported already, it is pretty much all mobs who can charge and /or jump that are bugged at the moment. There really is nothing you can do but wait.