Fix crafting output not updating sometimes (#4692)

* Only cancel crafting grid future if slot == 0

* Add some comments

core/src/main/java/org/geysermc/geyser/translator/protocol/java/inventory/JavaContainerSetSlotTranslator.java

@@ -71,10 +71,6 @@ public class JavaContainerSetSlotTranslator extends PacketTranslator<Clientbound
 
         InventoryTranslator translator = session.getInventoryTranslator();
         if (translator != null) {
-            if (session.getCraftingGridFuture() != null) {
-                session.getCraftingGridFuture().cancel(false);
-            }
-
             int slot = packet.getSlot();
             if (slot >= inventory.getSize()) {
                 GeyserLogger logger = session.getGeyser().getLogger();
@@ -111,14 +107,22 @@ public class JavaContainerSetSlotTranslator extends PacketTranslator<Clientbound
      * Checks for a changed output slot in the crafting grid, and ensures Bedrock sees the recipe.
      */
     private static void updateCraftingGrid(GeyserSession session, int slot, ItemStack item, Inventory inventory, InventoryTranslator translator) {
+        // Check if it's the crafting grid result slot.
         if (slot != 0) {
             return;
         }
+
+        // Check if there is any crafting grid.
         int gridSize = translator.getGridSize();
         if (gridSize == -1) {
             return;
         }
 
+        // Only process the most recent crafting grid result, and cancel the previous one.
+        if (session.getCraftingGridFuture() != null) {
+            session.getCraftingGridFuture().cancel(false);
+        }
+
         if (InventoryUtils.isEmpty(item)) {
             return;
         }