Replicated with only Citadel and Alex's Caves

Version of Citadel used: 2.4.9
Version of Alex's Caves used: 1.0.8

Curse of Binding is able to be applied onto the Resistor Shield in survival with an anvil. Unless there is supposed to be an intended effect of the shield not being able to be removed from the offhand, this appears to be unintentional.