Fix initialization order for the manager objects

Assets/Scripts/Core/ItemManager.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using UnityEngine;
 using Interactions;
+using Bootstrap;
 
 namespace Core
 {
@@ -63,13 +64,21 @@ namespace Core
         void Awake()
         {
             _instance = this;
+            
+            // Register for post-boot initialization
+            BootCompletionService.RegisterInitAction(InitializePostBoot);
         }
 
         void Start()
+        {
+            // SceneManagerService subscription moved to InitializePostBoot
+        }
+        
+        private void InitializePostBoot()
         {
             // Subscribe to scene load completed so we can clear registrations when scenes change
-            // Access Instance directly to ensure the service is initialized and we get the event hookup.
             SceneManagerService.Instance.SceneLoadStarted += OnSceneLoadStarted;
+            Logging.Debug("[ItemManager] Subscribed to SceneManagerService events");
         }
 
         void OnDestroy()