diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/network/PacketConsumers.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/network/PacketConsumers.java
index f6e4ed33d..51c2ed804 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/network/PacketConsumers.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/network/PacketConsumers.java
@@ -339,26 +339,26 @@ public class PacketConsumers {
                 if (sameItemSlot < 9) {
                     inventory.setHeldItemSlot(sameItemSlot);
                     ItemStack previousItem = inventory.getItem(slot - 36);
-                    BukkitCraftEngine.instance().scheduler().sync().runDelayed(() -> inventory.setItem(slot - 36, previousItem));
+                    BukkitCraftEngine.instance().scheduler().sync().runDelayed(() -> ItemUtils.setItem(inventory, slot - 36, previousItem));
                 } else {
                     ItemStack sameItem = inventory.getItem(sameItemSlot);
                     int finalSameItemSlot = sameItemSlot;
                     BukkitCraftEngine.instance().scheduler().sync().runDelayed(() -> {
-                        inventory.setItem(finalSameItemSlot, new ItemStack(Material.AIR));
-                        inventory.setItem(slot - 36, sameItem);
+                        ItemUtils.setItem(inventory, finalSameItemSlot, new ItemStack(Material.AIR));
+                        ItemUtils.setItem(inventory, slot - 36, sameItem);
                     });
                 }
             } else {
                 if (item.getAmount() == 1) {
                     if (ItemUtils.isEmpty(inventory.getItem(slot - 36))) {
-                        BukkitCraftEngine.instance().scheduler().sync().runDelayed(() -> inventory.setItem(slot - 36, itemStack));
+                        BukkitCraftEngine.instance().scheduler().sync().runDelayed(() -> ItemUtils.setItem(inventory, slot - 36, itemStack));
                         return;
                     }
                     if (emptySlot != -1) {
                         inventory.setHeldItemSlot(emptySlot);
-                        inventory.setItem(emptySlot, itemStack);
+                        ItemUtils.setItem(inventory, emptySlot, itemStack);
                     } else {
-                        BukkitCraftEngine.instance().scheduler().sync().runDelayed(() -> inventory.setItem(slot - 36, itemStack));
+                        BukkitCraftEngine.instance().scheduler().sync().runDelayed(() -> ItemUtils.setItem(inventory, slot - 36, itemStack));
                     }
                 }
             }
@@ -395,9 +395,9 @@ public class PacketConsumers {
                     if (picked == null) return;
                     inventory.setHeldItemSlot(targetSlot);
                     ItemStack previous = inventory.getItem(targetSlot);
-                    inventory.setItem(targetSlot, picked.clone());
+                    ItemUtils.setItem(inventory, targetSlot, picked.clone());
                     if (previous != null) {
-                        inventory.setItem(matchingSlot, previous);
+                        ItemUtils.setItem(inventory, targetSlot, previous);
                     } else {
                         picked.setAmount(0);
                     }
@@ -405,13 +405,13 @@ public class PacketConsumers {
             } else if (player.getGameMode() == GameMode.CREATIVE) {
                 inventory.setHeldItemSlot(targetSlot);
                 ItemStack previous = inventory.getItem(targetSlot);
-                inventory.setItem(targetSlot, itemStack);
+                ItemUtils.setItem(inventory, targetSlot, itemStack);
                 if (previous != null) {
                     for (int j = 1; j <= 3; j++) {
                         for (int i = j * 9; i < j * 9 + 9; i++) {
                             ItemStack itemInSlot = inventory.getItem(i);
                             if (ItemUtils.isEmpty(itemInSlot)) {
-                                inventory.setItem(i, previous);
+                                ItemUtils.setItem(inventory, i, previous);
                                 return;
                             }
                         }
@@ -448,9 +448,9 @@ public class PacketConsumers {
                     if (picked == null) return;
                     inventory.setHeldItemSlot(targetSlot);
                     ItemStack previous = inventory.getItem(targetSlot);
-                    inventory.setItem(targetSlot, picked.clone());
+                    ItemUtils.setItem(inventory, targetSlot, picked.clone());
                     if (previous != null) {
-                        inventory.setItem(matchingSlot, previous);
+                        ItemUtils.setItem(inventory, matchingSlot, previous);
                     } else {
                         picked.setAmount(0);
                     }
@@ -458,13 +458,13 @@ public class PacketConsumers {
             } else if (player.getGameMode() == GameMode.CREATIVE) {
                 inventory.setHeldItemSlot(targetSlot);
                 ItemStack previous = inventory.getItem(targetSlot);
-                inventory.setItem(targetSlot, itemStack);
+                ItemUtils.setItem(inventory, targetSlot, itemStack);
                 if (previous != null) {
                     for (int j = 1; j <= 3; j++) {
                         for (int i = j * 9; i < j * 9 + 9; i++) {
                             ItemStack itemInSlot = inventory.getItem(i);
                             if (ItemUtils.isEmpty(itemInSlot)) {
-                                inventory.setItem(i, previous);
+                                ItemUtils.setItem(inventory, i, previous);
                                 return;
                             }
                         }
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/ItemUtils.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/ItemUtils.java
index c88a13ee5..a46fce973 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/ItemUtils.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/ItemUtils.java
@@ -1,9 +1,14 @@
 package net.momirealms.craftengine.bukkit.util;
 
+import net.momirealms.craftengine.core.plugin.CraftEngine;
+import net.momirealms.craftengine.core.util.VersionHelper;
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.PlayerInventory;
 import org.jetbrains.annotations.Contract;
 
+import java.lang.reflect.InvocationTargetException;
+
 public class ItemUtils {
 
     @Contract("null -> true")
@@ -12,4 +17,23 @@ public class ItemUtils {
         if (item.getType() == Material.AIR) return true;
         return item.getAmount() == 0;
     }
+
+    public static void setItem(PlayerInventory inventory, int slot, ItemStack itemStack) {
+        try {
+            Object nmsInventory$getInventory = Reflections.clazz$CraftInventoryPlayer
+                    .getMethod("getInventory").invoke(inventory);
+            Object nmsInventory$items = Reflections.clazz$Inventory
+                    .getDeclaredField(VersionHelper.isMojmap() ? "items" : "i")
+                    .get(nmsInventory$getInventory);
+            Object nmsItemStack = Reflections.clazz$CraftItemStack
+                    .getMethod("asNMSCopy", ItemStack.class)
+                    .invoke(null, itemStack);
+            nmsInventory$items.getClass()
+                    .getMethod("set", int.class, Object.class)
+                    .invoke(nmsInventory$items, slot, nmsItemStack);
+        } catch (InvocationTargetException | IllegalAccessException |
+                 NoSuchMethodException | NoSuchFieldException e) {
+            CraftEngine.instance().logger().warn("Failed to set item", e);
+        }
+    }
 }
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/Reflections.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/Reflections.java
index 09e4c9847..815e606b3 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/Reflections.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/util/Reflections.java
@@ -3881,4 +3881,17 @@ public class Reflections {
             ReflectionUtils.getDeclaredField(
                     clazz$RecipeManager, clazz$FeatureFlagSet, 0
             );
+
+    public static final Class<?> clazz$CraftInventoryPlayer = requireNonNull(
+            ReflectionUtils.getClazz(
+                    BukkitReflectionUtils.assembleCBClass("inventory.CraftInventoryPlayer")
+            )
+    );
+
+    public static final Class<?> clazz$Inventory = requireNonNull(
+            ReflectionUtils.getClazz(
+                    BukkitReflectionUtils.assembleMCClass("world.entity.player.Inventory"),
+                    BukkitReflectionUtils.assembleMCClass("world.entity.player.PlayerInventory")
+            )
+    );
 }