Wrong tool breaking

I think there might be a bug in the tool breaking. I started a construction action and it said I needed to equip a hammer and I only had a copper ones on me so I equipped it and started the actions. Then I checked the guild storages in the town and found bronze hammers so I picked them up and equipped them all without stopping the construction action. The timer adjusted down 1 second like it should but now (190 actions later) in the action totals I'm seeing "Copper Hammer -1" and checked my inventory and am down 1 copper hammer but have all my bronze hammers. There is a chance that I broke a copper hammer in the first action or two before I changed to bronze and just missed it but I don't think that is what happened.