Fix initialization order for the manager objects

Assets/Scripts/UI/PauseMenu.cs

@@ -3,6 +3,7 @@ using Core;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 using Input;
+using Bootstrap;
 
 namespace UI
 {
@@ -43,10 +44,17 @@ namespace UI
         /// </summary>
         public bool IsPaused => _isPaused;
         
+        private void Awake()
+        {
+            _instance = this;
+            
+            // Register for post-boot initialization
+            BootCompletionService.RegisterInitAction(InitializePostBoot);
+        }
+
         private void Start()
         {
-            // Subscribe to scene loaded events
-            SceneManagerService.Instance.SceneLoadCompleted += SetPauseMenuByLevel;
+            // SceneManagerService subscription moved to InitializePostBoot
             
             // Set initial state based on current scene
             SetPauseMenuByLevel(SceneManager.GetActiveScene().name);
@@ -57,6 +65,13 @@ namespace UI
             #endif
         }
 
+        private void InitializePostBoot()
+        {
+            // Subscribe to scene loaded events
+            SceneManagerService.Instance.SceneLoadCompleted += SetPauseMenuByLevel;
+            Logging.Debug("[PauseMenu] Subscribed to SceneManagerService events");
+        }
+
         private void OnDestroy()
         {
             // Unsubscribe when destroyed