I found that when having more than two stack of platinum coin will make the game treat you as if you have no money, the nurse will refuse healing, can't reforge or buy something. But, when the money increased to five stack, everything will be OK now. And further increasing will cause this happen again. Also, if there is some money in the piggy bank, no matter how much, this issue won't happen. And another similar bug is that the money show will sometimes now right: I throw 3 stacks of Platinum Coin, and shown like above when I pick them back(what I actually picked is right though). Finally, if more than 1000 Platinum Coin in piggy bank, it will be shown as 999 P 99 G 99 S 99 C, I think it's not very likely a bug, but report it anyway.