Master Merchant card bugged
An AI player used the Master Merchant card against me while I was holding nothing but 2 wheat cards, but it stole ore and lumber even though I didn't even have those cards.
Maybe it had something to do with the game already being over. I had the amount of victory points necessary to win but the game didn't end. I received the last point one from defeating the barbarians but the game went on until it was my turn again.