Coins dissapearing

Game mode: [Online
Problem: bug
Region: [east coast

When I got to make coins in furnace it starts counting then they start disapearing

Steps on how to reproduce issue:
1.put gold bars in
2.start furnace

Yeah the whole smelting coins thing is poorly thought out. Coins melt to bars bars remelt to coins at a loss. No efficiency at all. If you want dust just grind it all bars give same amount as they would as coins. If you want coins then pull them out as they smelt which requires baby sitting the smelter