look at close status before assuming socket is closed.

MediaBrowser.Server.Implementations/HttpServer/NativeWebSocket.cs

@@ -120,9 +120,9 @@ namespace MediaBrowser.Server.Implementations.HttpServer
 
             var result = await WebSocket.ReceiveAsync(buffer, cancellationToken).ConfigureAwait(false);
 
-            if (result.CloseStatus.HasValue)
+            if (result.CloseStatus.HasValue && result.CloseStatus.Value != WebSocketCloseStatus.Empty)
             {
-                _logger.Info("Web socket connection closed by client.");
+                _logger.Info("Web socket connection closed by client. Reason: {0}", result.CloseStatus.Value);
                 return null;
             }