Creating alloys in the crucible shows them as "unknown alloy" on MP-Servers sometimes. Happend to me when creating brass. Is just a visual bug, when extracting the metal using ingot molds it forms ingots of the correct alloy.

I used it normally to smelt some ores into ingots. I then emptied it completely. Then put 9 copper ingots in and let them smelt into molten copper, then 1 zinc ingot. It created unknown alloy with 900mb copper and 100mb zinc. I then put an ingot mold in to extract and it filled up with brass. Tried to replicate in SP and creative but wasn't able to.

Bug is reproducable on my Server, just tried it.

What were the exact steps from an empty crucible you used to create the alloy that is showing incorrectly (i.e. added X mB of Y, removed X mB..., etc.)?

Didn't have this issue in SP yet so I suspect its some server desync.