GGG please help me!

Hello Guys,
So i was testing my lvl80 main at Dreadnought act2 normal. I i have 3k es (on chaos inoculation) i left 2 melee mobs attack me. 4 hits killed me instanly?!
I was furious! I dont know what the fuck just happened. iMy Es is still up and my character just drop dead. Please help get this Hardcore character back. I just got this to lvl80 a few hours ago.
Ps.Note : So i tested it again and went to Dreadnought n have those meleee mobs attack me. Didnt die but my ES goin doin slowly. So for sure this is "BUG".

waiting for your favourable reply