I'm sorry to bring this up again - I know we've gone over it a few times. BUT!
The loot source problem. I appreciate it's possible, and tbh easy - to change the source from "Trash" when an item is looted from a cache or chest. The thing is our Master Looter has a lot on his plate already and something automated would be much appreciated.
I've given it some thought, and this might be a possible solution. I'm happy to work on it if you think it's usable.
When a boss is killed - you register that. What I'm suggesting is you keep that boss name as a variable (last_boss_killed), then wipe it when PLAYER_ENTER_COMBAT.
If you can't find the name of the boss from the raid member target check and last_boss_killed ~= nil then source = last_boss_killed else source = "Trash"
Again, sorry to bring this up - I guess you're fed up of it.