Cannot get back the full object from the relational field after saving an object #1377

Parse.Cloud.define("testQuery", function(request, response) {
  var objectQuery = new Parse.Query(ObjectClass);
  var Object;

  objectQuery.include('user');
  objectQuery
  .get("_<object_id>_", {useMasterKey: true})
  .then(function(_object) {
    object = _object;
    object.set('user', request.user);
    console.log("1 ======> " + JSON.stringify(object.get("user")));
    console.log("1 ======> " + object.get("user").getUsername());
    return object.save(null, {useMasterKey: true});
  })
  .then(function() {
    console.log("2 ======> " + JSON.stringify(object.get("user")));
    console.log("2 ======> " + object.get("user").getUsername());
    response.success("");
  }, function(error) {
    response.error(error);
  });
});