I am trying to use conditions within a 1 level deep group but I am having some problems.

I am trying to set a condition based on if the user has chosen primary from the mew_location select list. If they haven’t it should hide the field mew_item_children. When I add the condition to this field it completely prevents the group from displaying.

My Code:

<?php
piklist('field', array(
  'type' => 'radio', 
  'field' => 'mew_type',
  'label' => __('What type of menu would you like to build?', WPDMEW_TEXT_DOMAIN),
  'value' => '',
  'column' => 12,
  'choices' => array(
    'standard' => __('Standard Menu', WPDMEW_TEXT_DOMAIN),
    'mega' => __('Mega Menu', WPDMEW_TEXT_DOMAIN),
  )
));

piklist('field', array(
  'type' => 'select',
  'field' => 'mew_location',
  'label' => __('Where will this appear?', WPDMEW_TEXT_DOMAIN),
  'value' => '',
  'column' => 12,
  'choices' => array(
    '' => '',
    'primary' => __('Primary Menu', WPDMEW_TEXT_DOMAIN),
    'secondary' => __('Secondary Menu', WPDMEW_TEXT_DOMAIN),
    'social' => __('Social Menu', WPDMEW_TEXT_DOMAIN),
    'footer' => __('Footer Menu', WPDMEW_TEXT_DOMAIN),
  ),
  'conditions' => array(
    array(
      'relation' => 'or',
      'field' => 'mew_type',
      'value' => array(
        'standard',
        'mega'
      ),
    )
  )
));

piklist('field', array(
  'type' => 'group',
  'field' => 'mew_primary_menu',
  'label' => __('', WPDMEW_TEXT_DOMAIN),
  'description' => __('', WPDMEW_TEXT_DOMAIN),
  'add_more' => true,
  'columns' => 12,
  'fields' => array(
    array(
      'type' => 'select', 
      'field' => 'mew_item_type',
      'label' => __('What kind of nav item do you want to add?', WPDMEW_TEXT_DOMAIN),
      'value' => '',
      'column' => 6,
      'choices' => array(
        '' => '',
        'page' => __('Page', WPDMEW_TEXT_DOMAIN),
        'post' => __('Post', WPDMEW_TEXT_DOMAIN),
        'external' => __('External', WPDMEW_TEXT_DOMAIN),
      ),
      'conditions' => array(
        array(
          'relation' => 'or',
          'field' => 'mew_location',
          'value' => array(
            'primary',
            'secondary',
            'social',
            'footer',
          )
        ),
      ),
    ),
    array(
      'type' => 'select', 
      'field' => 'mew_item_post',
      'label' => __('Select an existing post', WPDMEW_TEXT_DOMAIN),
      'value' => '',
      'column' => 6,
      'choices' => wpdmw_get_posts(),
      'conditions' => array(
        array(
          'field' => 'mew_primary_menu:mew_item_type',
          'value' => 'post',
        ),
      ),
    ),
    array(
      'type' => 'select', 
      'field' => 'mew_item_page',
      'label' => __('Select an existing page', WPDMEW_TEXT_DOMAIN),
      'column' => 6,
      'choices' => wpdmw_get_pages(),
      'conditions' => array(
        array(
          'field' => 'mew_primary_menu:mew_item_type',
          'value' => 'page',
        ),
      ),
    ),
    array(
      'type' => 'text',
      'field' => 'mew_item_external',
      'columns' => 12,
      'label' => __('Enter an external URL', WPDMEW_TEXT_DOMAIN),
      'validate' => array(
        array(
          'type' => 'url'
        )
      ),
      'conditions' => array(
        array(
          'field' => 'mew_primary_menu:mew_item_type',
          'value' => 'external',
        ),
      ),
    ),
    array(
      'type' => 'select', 
      'field' => 'mew_item_children',
      'label' => __('Display children of this page if exists?', WPDMEW_TEXT_DOMAIN),
      'value' => '',
      'column' => 12,
      'choices' => array(
        '' => '',
        '1' => __('Yes', WPDMEW_TEXT_DOMAIN),
        '0' => __('No', WPDMEW_TEXT_DOMAIN),
      ),
      'conditions' => array(
        'relation' => 'and',
        array(
          'field' => 'mew_primary_menu:mew_item_type',
          'value' => 'page',
        ),
        array(
          'field' => 'mew_primary_menu:mew_item_page',
          'value' => array(
            ''
          ),
          'compare' => '!='
        ),
        array(
          'field' => 'mew_location',
          'value' => 'primary',
          'compare' => '='
        ),
      ),
    ),
    array(
      'type' => 'select', 
      'field' => 'mew_bg_display',
      'label' => __('Add a background image?', WPDMEW_TEXT_DOMAIN),
      'value' => '',
      'column' => 12,
      'choices' => array(
        '' => '',
        'yes' => __('Yes', WPDMEW_TEXT_DOMAIN),
        'no' => __('No', WPDMEW_TEXT_DOMAIN),
      ),
      'conditions' => array(
        array(
          'field' => 'mew_primary_menu:mew_item_children',
          'value' => array(
            ''
          ),
          'compare' => '!='
        ),
      ),
    ),
    array(
      'type' => 'file',
      'field' => 'mew_item_bg_lg',
      'columns' => 6,
      'scope' => 'post_meta',
      'label' => __('Large', WPDMEW_TEXT_DOMAIN),
      'options' => array(
        'modal_title' => __('Add Image', WPDMEW_TEXT_DOMAIN),
        'button' => __('Add', WPDMEW_TEXT_DOMAIN),
      ),
      'conditions' => array(
        array(
          'field' => 'mew_primary_menu:mew_bg_display',
          'value' => 'yes',
        ),
      ),
      'validate' => array(
        array(
          'type' => 'limit',
          'options' => array(
            'min' => 1,
            'max' => 1
          )
        )
      )
    ),
    array(
      'type' => 'file',
      'field' => 'mew_item_bg_sm',
      'columns' => 6,
      'scope' => 'post_meta',
      'label' => __('Small', WPDMEW_TEXT_DOMAIN),
      'options' => array(
        'modal_title' => __('Add Image', WPDMEW_TEXT_DOMAIN),
        'button' => __('Add', WPDMEW_TEXT_DOMAIN),
      ),
      'conditions' => array(
        array(
          'field' => 'mew_primary_menu:mew_bg_display',
          'value' => 'yes',
        ),
      ),
      'validate' => array(
        array(
          'type' => 'limit',
          'options' => array(
            'min' => 1,
            'max' => 1
          )
        )
      )
    ),
  ),
));

I am finding the conditions in general very buggy. Is there something wrong with my code?