If you are using another query inside `restrict_manage_posts` make sure you add `&& $query->is_main_query()` to your parse_query if statement, otherwise the parse_query filter will interfere with that second query.

`if ( 'POST_TYPE' == $type
      && is_admin()
      && $pagenow=='edit.php'
      && isset($_GET['ADMIN_FILTER_FIELD_VALUE'])
      && $_GET['ADMIN_FILTER_FIELD_VALUE'] != ''
      && $query->is_main_query()
) {
      $query->query_vars['meta_key'] = 'META_KEY';
      $query->query_vars['meta_value'] = $_GET['ADMIN_FILTER_FIELD_VALUE'];
}`