We had a bug where our hard mode chest loot after huhu became soulbound to our master-looter and non-tradeable. The loot in question is Sharpened Silithid Femur, Plans: Obsidian Heartseeker, Formula: Rudy-Encrusted Broach. From raid ID 52373452
For reference this is the “can’t trade loot” post from blizzard:
These items fall under the tradeable category, I submitted the tickets, bug reports, forum posts immediately after this issue occurred so the 2hour “trade window” was not even available to be used as an excuse as our master looters fault.