I’m not sure what release this broke in (using 0.9.4.9), but when I load the page with the following field, the inner fields don’t display the stored value. I checked the database and verified that the values are storing as expected.

piklist('field', array(
  'type'    => 'group',
  'field'   => 'pages-wrap-html',
  'label'   => 'Wrap Section in HTML',
  'conditions'=> array(
    array(
      'field'   => 'pages',
      'value'   => array('all', 'select')
    )
  ),
  'fields'  => array(
    array(
      'type'      => 'text',
      'field'     => 'pages-wrap-before',
      'columns'   => 4,
      'attributes'=> array(
        'placeholder' => 'Before'
      )
    ),
    array(
      'type'      => 'text',
      'field'     => 'pages-wrap-after',
      'columns'   => 4,
      'attributes'=> array(
        'placeholder' => 'After'
      )
    )
  )
));