Nested groups conflict

Hi, I'm using nested groups in my application but I'm having trouble with the clones and the hidden/visibility conditionals.

The problem occurs when I add a cloneable group (level 3) inside a group (level 2) that is already inside a cloneable group (level 1). When I do that, is possible to delete all the cloneables group until I have a blank screen and the button '+ Add more' no longer works.

Also, if I use a conditional at this level, it also stops working.

$meta_boxes[] = array(
      'title'      => __( 'Metabox 1', 'textdomain' ),
      'id'         => 'metabox1',
      'post_types' => 'rep_page',
      'fields'     => array(
        array(
          'id' => 'group1',
          'type' => 'group',
          'clone' => true,
          'sort_clone' => true,
          'fields' => array(
            array(
              'id'   => 'select1',
              'name' => __( 'Select 1', 'textdomain' ),
              'type' => 'select',
              'placeholder' => 'Select',
              'options' => array(
                1 => 'Subgroup 1',
                2 => 'Subgroup 2',
              ),
            ),
            array(
              'id'   => 'subgroup1',
              'type' => 'group',
              'hidden' => array('select1', '!=', 1),
              'fields' => array(
                array(
                  'id' => 'subtext1',
                  'name' => __( 'Subtext 1', 'textdomain' ),
                  'type' => 'text',
                  'placeholder' => 'Text',
                ),
              ),
            ),
            array(
              'id'   => 'subgroup2',
              'type' => 'group',
              'hidden' => array('select1', '!=', 2),
              'fields' => array(
                array(
                  'id'   => 'subtext2',
                  'name' => __( 'Subtext 2', 'textdomain' ),
                  'type' => 'text',
                  'placeholder' => 'Text',
                ),
                array(
                  'id'   => 'sub_subgroup1',
                  'type' => 'group',
                  'clone' => true,
                  'sort_clone' => true,
                  'max_clone' => 3,
                  'fields' => array(
                    array(
                      'id'   => 'sub_subselect1',
                      'name' => __( 'Sub Sub Select 1', 'textdomain' ),
                      'type' => 'select',
                      'placeholder' => 'Select',
                      'options' => array(
                        1 => 'Sub Sub Subgroup 1',
                        2 => 'Sub Sub Subgroup 2',
                      ),
                    ),
                    array(
                      'id'   => 'sub_sub_subgroup1',
                      'type' => 'group',
                      'hidden' => array('sub_subselect1', '!=', 1),
                      'fields' => array(
                        array(
                          'id' => 'sub_sub_subtext1',
                          'name' => __( 'Sub Sub Subtext 1', 'textdomain' ),
                          'type' => 'text',
                          'placeholder' => 'Text',
                        ),
                      ),
                    ),
                    array(
                      'id'   => 'sub_sub_subgroup2',
                      'type' => 'group',
                      'hidden' => array('sub_subselect2', '!=', 2),
                      'fields' => array(
                        array(
                          'id' => 'sub_sub_subtext2',
                          'name' => __( 'Sub Sub Subtext 2', 'textdomain' ),
                          'type' => 'text',
                          'placeholder' => 'Text',
                        ),
                      ),
                    ),
                  ),
                ),
              ),
            ), 
          ),
        ),
      ),
    );