I don't know if this is a bug or not, but I had two Plague Doctor's Masks I used on two separate Anvils of Kron, and neither of them gained or lost any enchantments whatsoever. I actually think it's kind of funny to imagine Kron being too afraid to come near the mask so I'm not sure if it's intended, but at the very least the Anvil shouldn't be used up then if this is the intended design. xD
Daynab commented to a Similar post from earlier: http://community.gaslampgames.com/threads/invisible-kronged-stats.2137/
