API Карт Google и duration_in_traffic

Я пытаюсь понять DistanceMatrix API. Когда я делаю это в браузере:

https://maps.googleapis.com/maps/api/distancematrix/json?origins=14.614786,121.046587&destinations=14.610301,121.080233&mode=driving&language=en&departure_time=now&key=MY_KEY

Я получаю duration_in_traffic.

{
   "destination_addresses" : [
      "17 Orchard Rd, Bagumbayan, Quezon City, 1109 Metro Manila, Philippines"
   ],
   "origin_addresses" : [ "74 C. Benitez St, Quezon City, Metro Manila, Philippines" ],
   "rows" : [
      {
         "elements" : [
            {
               "distance" : {
                  "text" : "8.5 km",
                  "value" : 8470
               },
               "duration" : {
                  "text" : "23 mins",
                  "value" : 1406
               },
               "duration_in_traffic" : {
                  "text" : "35 mins",
                  "value" : 2112
               },
               "status" : "OK"
            }
         ]
      }
   ],
   "status" : "OK"
}

Но когда он у меня в голанге с помощью API карт

Я не получаю duration_in_traffic и возвращаю только null

    r := &maps.DistanceMatrixRequest{
    Language:      *language,
    DepartureTime: "now",
    ArrivalTime:   *arrivalTime,
}

Ниже результат

{
    "origin_addresses": [
        "74 C. Benitez St, Quezon City, Metro Manila, Philippines"
    ],
    "destination_addresses": [
        "17 Orchard Rd, Bagumbayan, Quezon City, 1109 Metro Manila, Philippines"
    ],
    "rows": [
        {
            "elements": [
                {
                    "status": "OK",
                    "distance": {
                        "text": "8.5 km",
                        "value": 8470
                    },
                    "duration": {
                        "value": 1406,
                        "text": "23m26s"
                    },
                    "duration_in_traffic": null
                }
            ]
        }
    ]
}

Что-то я делаю не так?

Обновлено:

    r := &maps.DistanceMatrixRequest{
    Origins:       strings.Split(origins, "|"),
    Destinations:  strings.Split(destinations, "|"),
    Language:      "en",
    DepartureTime: "now",
    Mode:          maps.TravelModeDriving,
    Units:         maps.UnitsMetric,
}

resp, err := client.DistanceMatrix(context.Background(), r)
if err != nil {
    return c.JSON(http.StatusBadRequest, err)
}

return c.JSON(http.StatusOK, resp)