when you cook something in a furnace sometimes you get something different ex cook iron ore get a feather dirt bowl or gold ingot this happens with all cookable items
Linked issues
Comments 2
This has already been reported at MCPE-15423 – If you have not, please use the search function in the future, to see if your bug has already been submitted, as currently over 47% of tickets are being closed as duplicate.
For me the furnace does not even work I'm putting no matter what item but is not smelting anything like iron as a input and coal as a fuel