i’m running into the same problem and searched the forums for this fix, so i suppose it hasn’t been addressed yet.
i’ve come up with the following with the following workaround:
in wp-includes/template-functions-category.php search for
$extra_fields = 'cat_name, category_nicename, category_description,';
and afterwards place the following:
if ($child_of != 0) {
$extra_fields = 'cat_name, category_nicename, category_description,category_parent,';
}
seems to work so far…