So i was running my guildies ToC 25man heroic on my level 50 main 133 ilv. Steam rolling it letting them get full tags…ect. We been running every single week for a month now gearing for Harold of the titans. 3rd boss the council i did 1.3 million damage and still couldn’t open the chest for some stupid reason. No one could open it. We open tickets every week on multiple toons, but nothing happens. So, no loot from that place AND the GM told me and my guildies that there is nothing they can do about it it not giving us loot which i think is bs. I have damage meters showing that we have everyone present did damage. We aren’t a mythic guild for no reason. Also, at the end of the dungeon the portal to leave said lvl 45 only … which is stupid in my opinion.
Regardless of the information you have, Blizzard will only go by their logs. If their logs show that you were not eligible for the loot, then a GM’s hands are tied, and they will not give you loot.
If you believe there is a bug, you will need to post in the Bug Report Forum.
this can be a problem when outgearing old raids…
try not blowing stuff up, take the fights more slowly.
i couldn’t figure out who this Harold person was… and then i realized it was meant to be “Herald” 
i steam roll it after i let them tag it.
Just thought of this, but there may be some certain mechanics you need to follow, in order for the chests to give loot, instead of steamrolling them.
It’s not a good idea to troll here. This is the most heavily moderated forum.
There’s no white knighting involved in saying that killing certain raid bosses quickly can sometimes prevent loot from spawning. Is it annoying? Yes. Is it also true? Yes.
GMs don’t fix bugs. You would need to file a Bug Report.