[ Exactly like on purpose. Ganymede has hit the nail right on the head. ]

Traditionally, yes, one would expect a bug report before it ran out of control like this. However. [ He waves off towards the bugged NPCs with their area spread debuff, still sticking away. ] This bug required a bit of dragging about. What if I had done nothing more than wait for it to tick down and kill me one I returned, never infecting anything else with it?