Fixed Serialization Transfer.

Source/Editor/Undo/Actions/AddRemoveScriptAction.cs

@@ -75,6 +75,11 @@ namespace FlaxEditor.Actions
             _enabled = true;
         }
 
+        public int GetOrderInParent()
+        {
+            return _orderInParent;
+        }
+
         /// <summary>
         /// Creates a new added script undo action.
         /// </summary>
@@ -184,6 +189,7 @@ namespace FlaxEditor.Actions
             script.Parent = parentActor;
             if (_orderInParent != -1)
                 script.OrderInParent = _orderInParent;
+            _orderInParent = script.OrderInParent; // Ensure _orderInParent is correct for script that want to use it.
             if (_prefabObjectId != Guid.Empty)
                 SceneObject.Internal_LinkPrefab(Object.GetUnmanagedPtr(script), ref _prefabId, ref _prefabObjectId);
             Editor.Instance.Scene.MarkSceneEdited(parentActor.Scene);