move reattaching user data to own function and call it only after fetching metadata for the first time

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -2053,6 +2053,8 @@ namespace MediaBrowser.Controller.Entities
         public virtual async Task UpdateToRepositoryAsync(ItemUpdateType updateReason, CancellationToken cancellationToken)
          => await LibraryManager.UpdateItemAsync(this, GetParent(), updateReason, cancellationToken).ConfigureAwait(false);
 
+        public void ReattachUserData(CancellationToken cancellationToken) => LibraryManager.ReattachUserData(this, cancellationToken);
+
         /// <summary>
         /// Validates that images within the item are still on the filesystem.
         /// </summary>

MediaBrowser.Controller/Library/ILibraryManager.cs

@@ -281,6 +281,13 @@ namespace MediaBrowser.Controller.Library
         /// <returns>Returns a Task that can be awaited.</returns>
         Task UpdateItemAsync(BaseItem item, BaseItem parent, ItemUpdateType updateReason, CancellationToken cancellationToken);
 
+        /// <summary>
+        /// Reattaches the user data to the item.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        void ReattachUserData(BaseItem item, CancellationToken cancellationToken);
+
         /// <summary>
         /// Retrieves the item.
         /// </summary>

MediaBrowser.Controller/Persistence/IItemRepository.cs

@@ -35,6 +35,13 @@ public interface IItemRepository
 
     void SaveImages(BaseItem item);
 
+    /// <summary>
+    /// Reattaches the user data to the item.
+    /// </summary>
+    /// <param name="item">The item.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    void ReattachUserData(BaseItem item, CancellationToken cancellationToken);
+
     /// <summary>
     /// Retrieves the item.
     /// </summary>