let me do the maths for u

u inserted 156 gold ore (every 3 makes 1 bar) so this resulted in 52 gold bars.(156/3) this procedure ended

and started melting bars (every bar makes 5 coins) , so this resulted in 260 coins. (52*5) this procedure ended

and started melting coins back to bars (every 30 coins make 1 bar) so this resulted in 8 bars (260/30) this procedure ended

and started recrafting the 8 bars into coins (each for 5 coins) so this resulted into 43 coins (8 aprox *5) . this procedure ended

and then the 43 coins re melted into the equal bars they could doâ€¦ so 30 coins became 1 bar and u r left with 13 coins and 1 barâ€¦guess what the last bar turned intoâ€¦ yup coinsâ€¦ so u ended up in 13 coins which was the step above and 7 more (if u do the exact maths as i have them u will see that u end up in 7,222 coins ) which means 13+7 = 20 and this is what u seeâ€¦ as all the above r calculated instantyâ€¦

that is why u end with 20 coinsâ€¦ the furnace will not stop untill the quantity of the bars or coins cannot be remeltedâ€¦ hope it helps u to understand

edit: i just re read the postâ€¦ will try to duplicate as ur issue is not the recrafting thingieâ€¦ but the conversion rate

(sry about the above! i brainfarted it seems)

edit: i just tried to melt gold ore and it melts normally

u reproduce the bug all the times? used coal and daya as smelterâ€¦