Hello,
just wiped and killed Ragnaros at the same time.
He went down, the chest spawned and Ragnaros respawned.
The Boss were downed with Kill Shot from a Hunter. While the Shot was on his way the Hunter got killed.
And while the Boss thought oh wipe I respawn now, he got killed.
So I think it happened ~~^^
Proof:
Then we killed him again and got again loot rep and vp !!
Hf trying to get him to do this again