I was fighting 5 Nordheimer warriors from New Asagarth and suddenly 4 of them disappeared and only one remained.
Please provide a step-by-step process of how the bug can be reproduced. The more details you provide us with the easier it will be for us to find and fix the bug:
I am not exactly sure how to reproduce this bug, I was just fighting those enemies and backed off a little to heal some health and suddenly they just disappeared completely.