Following RUNTIME-4098, all responses generated by the JSON reader and handled by the Jquery are automatically transform into JSON (if not configured otherwise).

The server response is preprocess by Jquery before invocking the success handler.
The preprocessing is based on the dataType configuration and if none is provided, the MIME type. By honoring the application/json MIME, the response generated by the JSONReader are now automatically parse into JSON.

Previously necessary call to JSON.parse in the success handler now result in a error.