Killed instantly by Air?

I dont know why the need for small minions to be hitting me 1 hit after they are dead. It was not an exploded body or anything like that. Nothing visible. I do not have a screen particle build so I can see that clear as day nothing hit me. How am I also being 1 shot by a monster (not a boss) when I can stand there and take their hits dozens of times. But the second I killed a group of monsters (from really far away) it has killed me instantly afterwards. Please fix this mechanic that has low mobs 1 shotting over 10k dmg. I have full resistances too and chaos innoculation. Definately a bug.