Nostalrius Begins - Quality wow vanilla realm (1.12)

Im fighting pvp vs horde guy. He has lower chance to kill me than die and he disapper. WTF? he had dots of rapture and he dessapiared.

What bug he used? or not bug

Our queues are 20+ minutes for battlegrounds on some nights. If you're fighting one of us and we vanish, it's likely our queue finally popped and we joined a battleground.