Order by not working with wp_get_post_terms

I’m trying to display the terms for a given taxonomy (disciplines).

I want the terms to display without links, and in alphabetical order. Everything works correctly, except for the ordering. No matter what I try I cannot get the list to order alphabetically by name.

This is the code

<?php 

$args = array(
'orderby' => 'name',
'order' => 'ASC'
);

$disciplines = wp_get_post_terms($post->ID, 'disciplines', $args);

echo '<ul>';
foreach($disciplines as $discipline){
  echo '<li>' . $discipline->name . '</li>';
}
echo '</ul>';

?>