Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello, allways after i drink (and i am buffed by) Winterfall Firewater, i get disconnect very often. i drink it only in molten core raid so i am not sure if it is global problem or only in this instance. also it may be problem in combination with another buff (juju, elixirs.....).

Are you a cow?

or an elf^^ elfs and cows have firewater problems it seems