Sorry if the topic is not formatted appropiately, because I actually don't know if it's a bug or working as intended

Today I killed the world boss Valinor for my paladin in order to get the legendary, but I died during the fight. When I came back the boss respawned too fast and I didn't get the loot.

I killed him a second time and didn't die, but it didn't gave me any loot, now I have to wait another reset for another chance at the loot?