Select on cloned group can't be updated

Hi,
I have problem on cloned group which has Select field.
On first group, I can select option from the field, but when I cloned the group, the select field can't be update and just copied the value from the previous group.

The code works fine on admin page, but on front-page the problem occurred.

Here is the code:

array(
                'id'          => 'g1',
                'name'        => 'Branches',
                'type'        => 'group',
                'clone'       => true,
                'sort_clone'  => true,
                'collapsible' => true,
                'group_title' => array( 'field' => 'name' ), // ID of the subfield
                'save_state' => true,

                'fields' => array(
                    array(
                        'name' => 'Name',
                        'id'   => 'name',
                        'type' => 'text',
                    ),
                    array(
                        'name' => 'Address',
                        'id'   => 'address',
                        'type' => 'text',
                    ),
                    array(
                        'id'          => 'contacts',
                        'type'        => 'group',
                        'clone'       => true,
                        'collapsible' => true,
                        'save_state'  => true,
                        'group_title' => array( 'field' => 'person' ),
                        'fields'      => array(
                            array(
                                'id'   => 'person',
                                'type' => 'text',
                                'name' => 'Person',
                            ),
                            array(
                                'id'   => 'phone',
                                'type' => 'text',
                                'name' => 'Phone',
                            ),
                            array(
                              'id' => 'saudara_status_test',
                              'name' => 'Status',
                              'type' => 'select',
                              'placeholder' => 'Pilih salah satu',
                              'options' =>           array(
                                'Pelajar' => 'Pelajar',
                                'Mahasiswa' => 'Mahasiswa',
                                'Pegawai' => 'Pegawai',
                                'Lainnya' => 'Lainnya',
                              ),
                            ),
                        ),
                    ),
                ),
            ),

Please help...