I abandoned a ploy with 4k on it in escrow for taxes. I can confirm it didn't refund the gold

I've made Iron, Tin, Silver and Copper in them. I used them for 3 days without issues. Using one advanced smelter and 2 regular smelters at the same time, the advance smelters eat everything I put in right away. But, after the other two smelters finished and were emptied, the advanced smelter worked again. I'm sure curious if it's using multiple smelters at the same time that is the issue, or if it's just a hit and miss bug.

I'll do more testing tomorrow and Monday.