update FindByPath

MediaBrowser.Server.Implementations/Library/LibraryManager.cs

@@ -795,12 +795,18 @@ namespace MediaBrowser.Server.Implementations.Library
                 Path = path
             };
 
+            // Only use the database result if there's exactly one item, otherwise we run the risk of returning old data that hasn't been cleaned yet.
             var items = GetItemIds(query).Select(GetItemById).Where(i => i != null).ToArray();
 
             if (items.Length == 1)
             {
                 return items[0];
             }
+
+            if (items.Length == 0)
+            {
+                return null;
+            }
             
             return RootFolder.FindByPath(path);
         }