Keep killing bosses for a first time, and not getting loot

I killed Attumen two or three times, no loot.
I killed the dragon boss (Not DW) in Dragon Soul, and no loot.

I think I missed 2-3 other bosses I killed today, and AGAIN no loot.

I am going in solo so it’s not a matter of someone else getting the loot.
It is NEVER the first boss of the raid/dungeon, so I am not re-clearing. First boss always gives loot.

This is pissing me off because I’ve lost at least 2 shots at midnight from this, and I don’t know what to do. Once I could deal with, but like I said at least 5 bosses that I have lost my loot from, and no it dose not appear in the mail box. The game just thinks I am re-killing bosses that I have never killed on that specific character since reset.

stop instantly one shotting them and let them engage in combat for a second first

VERY hard to do on some bosses because you need to hit them to agro them, and they’re one hit KOs.

press taunt

I didn;t mean on my paily.

don’t use a channeled spell to 1 shot the boss then