Heli & Bradley crates spawning random loot instead of sorted

I made a loottable for both of them, but all the crates just have random items instead of the sorted crates like Ammo, Explosive, M249, Gun

I'll just get crates with random stuff like c4, m249, ak, holosight in 1 crate instead of just ammo or just explosives

did you ever find a way to get this working?