$cordovaCamera.getPicture callabck method does not call every time

ionic-v1
1 
$cordovaCamera.getPicture ({
                    DestinationType: Camera.DestinationType.FILE_URL,
                    quality: 50,
                    targetWidth: 200,
                    targetHeight: 200,
                    sourceType: 0,
                    allowEdit: true,
                    encodingType: Camera.EncodingType.JPEG,

                    saveToPhotoAlbum: false
                }).then(function (filePath) {
                   //does not call every time
},  function (errs) {
                        alert(errs);
                        // An error occured. Show a message to the user
                    });