Facebook API different responses

Question

I am using Facebook Graph API to request some of the users data using javascript fetch method. The problem that the response that returned when I was trying on the Graph API Explorer https://developers.facebook.com/tools/explorer is different than the one that returned to the fetch method.

The request is: https://graph.facebook.com/v2.8/me?fields=birthday%2Cemail%2Cage_range%2Cabout%2Cgender%2Cfirst_name%2Clast_name%2Clocation%7Blocation%7D%2Ccover%2Cpicture.height(800).width(800)%2Chometown%7Blocation%7D&access_token=MY_ACCESS_TOKEN

In the explorer the response returned all the requested data while in the fetch method birthday, location and hometown are missing. so what is the reason behind the difference in these responses?

Here is the Graph API response:

{
   "id": "10152311252041311",
   "birthday": "12/11/1992",
   "age_range": {
      "min": 21
   },
   "gender": "male",
   "first_name": "Karim",
   "last_name": "Elbawab",
   "location": {
      "location": {
         "city": "Cairo",
         "country": "Egypt",
         "latitude": 30.0581,
         "longitude": 31.2289
      },
      "id": "115351105145884"
   },
   "cover": {
      "id": "10153054290206311",
      "offset_y": 36,
      "source": "https://scontent.xx.fbcdn.net/v/t31.0-8/s720x720/11080657_10153054290206311_8236239774331416126_o.jpg?oh=7a5e55ce637ddbcbdacb485c5830bbaf&oe=5998BAC0"
   },
   "picture": {
      "data": {
         "height": 958,
         "is_silhouette": false,
         "url": "https://scontent.xx.fbcdn.net/v/t1.0-1/c1.0.958.958/14492344_10154345907211311_2194946159496032335_n.jpg?oh=27591ffb185acde25518df742f7cbf68&oe=598BA899",
         "width": 958
      }
   },
   "hometown": {
      "location": {
         "city": "Port Said",
         "country": "Egypt",
         "latitude": 31.2667,
         "longitude": 32.3
      },
      "id": "106225446079687"
   }
}

Here is how I am doing the fetch request:

var url = "https://graph.facebook.com/v2.8/me?fields=birthday%2Cemail%2Cage_range%2Cabout%2Cgender%2Cfirst_name%2Clast_name%2Clocation%7Blocation%7D%2Ccover%2Cpicture.height(800).width(800)%2Chometown%7Blocation%7D&";
    url += "access_token=" + accessToken.value;

    fetch(url,{
        method:"GET"
    }).then(function(result){
        var user_info = JSON.parse(result._bodyInit);
        authentication_api.loginWithFacebook(user_info).then(function(res) {
            callback(res);
        });
    }).catch(function(error){
        console.log("Error: " + error);
        callback(error);
    });
}

The Fetch Response:

{"type":"default","status":200,"ok":true,"statusText":"OK","headers":{"map":{"cache-control":["private, no-cache, no-store, must-revalidate"],"x-fb-deb:["kHzlkaPnR7TExQXruPW/ibxz09g8LxiGsofdsFZVCUE4/ij1sebOSAcyn16osY3Q+4czC8MUT1Er5vrr3mueHg=="],"pragma":["no-cache"],"expires":["Sat, 01 Jan 2000 00:00:00 GMT"],"vary":["Accept-Encoding"],"x-fb-tracd":["G9ozccWmdM/"],"x-fb-rev":["2950242"],"x-android-selected-protocol":["http/1.1"],"x-android-response-source":["NETWORK 200"],"connection":["keep-alive"],"x-android-sent-millis":["1491911956237" content-type":["text/javascript; charset=UTF-8"],"date":["Tue, 11 Apr 2017 11:59:17 GMT"],"facebook-api-version":["v2.8"],"etag":["\"515d42cd12052847a3f24b113f810035508e12be\""],"null":["HTTP/1.1 2 OK"],"x-android-received-millis":["1491911956438"],"access-control-allow-origin":["*"]}},"url":"","_bodyInit":"{\"age_range\":{\"min\":21},\"gender\":\"male\",\"first_name\":\"Karim\",\"last_name\" Elbawab\",\"cover\":{\"id\":\"10153054290206311\",\"offset_y\":36,\"source\":\"https:\\/\\/scontent.xx.fbcdn.net\\/v\\/t31.0-8\\/s720x720\\/11080657_10153054290206311_8236239774331416126_o.jpg?oh=755ce637ddbcbdacb485c5830bbaf&oe=5998BAC0\"},\"picture\":{\"data\":{\"height\":958,\"is_silhouette\":false,\"url\":\"https:\\/\\/scontent.xx.fbcdn.net\\/v\\/t1.0-1\\/c1.0.958.958\\/14492344_10154345211311_2194946159496032335_n.jpg?oh=27591ffb185acde25518df742f7cbf68&oe=598BA899\",\"width\":958}},\"id\":\"10154881281451311\"}","_bodyText":"{\"age_range\":{\"min\":21},\"gender\":\"male\",\"first_ame\":\"Karim\",\"last_name\":\"Elbawab\",\"cover\":{\"id\":\"10153054290206311\",\"offset_y\":36,\"source\":\"https:\\/\\/scontent.xx.fbcdn.net\\/v\\/t31.0-8\\/s720x720\\/11080657_1015305429020631236239774331416126_o.jpg?oh=7a5e55ce637ddbcbdacb485c5830bbaf&oe=5998BAC0\"},\"picture\":{\"data\":{\"height\":958,\"is_silhouette\":false,\"url\":\"https:\\/\\/scontent.xx.fbcdn.net\\/v\\/t1.0-1\\/0.958.958\\/14492344_10154345907211311_2194946159496032335_n.jpg?oh=27591ffb185acde25518df742f7cbf68&oe=598BA899\",\"width\":958}},\"id\":\"10154881281451311\"}"}