Thank you, here's a screenshot https://imgur.com/a/4RBqvNY
But I also tried pretty much every setting including "Looting frequency: High", "Loot anything over 1gp", "Custom loot: Big bones"
Something else to consider while you're looking at it; I found another script where it works for the most part except for when you kill a mob on a tile that already has loot on it, it will keep trying to pick up that loot over and over again until it despawns. I'm not sure if yours already considers this, since it didn't get that far, but here's a screenshot of the chat message you can check for. There would be at least 4 different versions of this message, for male/female and normal/group iron. Possibly hardcore/ultimate iron as well. I can get screenshots for the rest if you need them.
https://imgur.com/a/eNCeiNb