The new update you rolled out shortly ago regarding zombies dropping new loot is causing other NPCs to do the same thing. Tunnel Dwellers (and most likely Scientists as well - I haven't looked at them specifically yet) are now dropping about 1/5th or less of what they normally were before.
The picture shown is an entire loot table dropped by a tunnel dweller. No components or bullets dropped on that guy. Another Dweller only dropped 2 Metal Blades as his entire table.
Server: Scourge