After smelting iron ore to iron ingot, the furnace showed that smelting is going like first screenshot I send, but nothing was smelting. After that, I put gold ore in the furnace, but nothing happen as second screenshot. This problem has occurred other furnace and even if furnaces was removed and put on again and restarted minecraft, nothing got better.
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Thank you for your report!
We're actually already tracking this issue at MCPE-68978, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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