Fix #251

src/main/java/com/drmangotea/tfmg/content/machinery/metallurgy/blast_furnace/BlastFurnaceHatchBlockEntity.java

@@ -16,6 +16,7 @@ import net.minecraft.nbt.CompoundTag;
 import net.minecraft.network.chat.Component;
 import net.minecraft.world.entity.item.ItemEntity;
 import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.Items;
 import net.minecraft.world.level.block.entity.BlockEntityType;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.phys.Vec3;
@@ -82,6 +83,9 @@ public class BlastFurnaceHatchBlockEntity extends SmartBlockEntity implements IH
     public void dropItems(){
 
         if(level.getBlockState(getBlockPos().below()).isAir()){
+            if (inventory.getItem(0).getItem() == Items.AIR){
+                return;
+            } else {
                 Vec3 dropVec = VecHelper.getCenterOf(worldPosition)
                         .add(0, -12 / 16f, 0);
                 ItemEntity dropped = new ItemEntity(level, dropVec.x, dropVec.y, dropVec.z, inventory.getItem(0).copy());
@@ -91,6 +95,7 @@ public class BlastFurnaceHatchBlockEntity extends SmartBlockEntity implements IH
                 inventory.setStackInSlot(0, ItemStack.EMPTY);
             }
         }
+    }
 
     @Override
     protected void read(CompoundTag compound, HolderLookup.Provider registries, boolean clientPacket) {