Poplar saplings are not used as fuel in the furnace or related block, even though all other saplings can be used this way.
How to reproduce:
Place a furnace.
Try to place a poplar sapling in its fuel slot.
-> ❌ The item is not placed in the slot.
Comments 2
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Wool slabs and stairs are tracked at MC-309067, so I have removed them from this report.