Unfortunately, theme author is long gone.. ??
I found the culprit, in functions.php:
function maybe_list_children($content) {
if (trim(strip_tags($content)) == '') {
return '<ul class="children-list">' . wp_list_pages('child_of=' . get_the_ID() . '&echo=0&title_li=') . '</ul>';
} else {
return $content;
}
}
function list_children_shorttag() {
return maybe_list_children('');
}
add_filter('the_content','maybe_list_children');
add_shortcode('puslapiai', 'list_children_shorttag')
if I comment out add_filter call, it starts to work..