Affects Version/s: Minecraft 1.11.2, Minecraft 17w06a, Minecraft 1.12.1, Minecraft 1.13.1, Minecraft 1.13.2, Minecraft 19w12b, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b, 1.15.2, 20w08a, 20w20b, 20w21a
Fix Version/s: None
Buckets which get modified in a furnace lose their NBT data. Lava buckets can be used as fuel and turn into empty buckets and empty buckets can be used to collect the water when drying a sponge.
- Place a furnace and put a smeltable item in it
- Put a named lava bucket as fuel in it
- Hover over the created empty bucket
→ You will see that it has no name anymore
Based on 1.11.2 decompiled using MCP 9.35 rc1
The methods net.minecraft.tileentity.TileEntityFurnace.update() (lava bucket → empty bucket) and net.minecraft.tileentity.TileEntityFurnace.smeltItem() (empty bucket → water bucket) create a new item stack.