PaperMC/paper-server/nms-patches/net/minecraft/world/inventory/SlotFurnaceResult.patch

--- a/net/minecraft/world/inventory/SlotFurnaceResult.java
+++ b/net/minecraft/world/inventory/SlotFurnaceResult.java
@@ -46,7 +46,7 @@
     protected void b_(ItemStack itemstack) {
         itemstack.a(this.player.level, this.player, this.removeCount);
         if (this.player instanceof EntityPlayer && this.container instanceof TileEntityFurnace) {
-            ((TileEntityFurnace) this.container).a((EntityPlayer) this.player);
+            ((TileEntityFurnace) this.container).a((EntityPlayer) this.player, itemstack, this.removeCount); // CraftBukkit
         }
 
         this.removeCount = 0;