Hi Domien,
It looks like the BuddyBoss theme removed the hooks that my plugin uses. The only way to get it to work with that theme is to modify the theme (or preferably child theme) file.
wp-content\themes\buddyboss-theme(-child)\bbpress\content-single-topic-lead.php
Find this…
<div class="item-description">
<?php bbp_topic_content(); ?>
</div>… and replace it with this…
<div class="item-description">
<?php do_action( 'bbp_theme_before_topic_content' ); ?>
<?php bbp_topic_content(); ?>
<?php do_action( 'bbp_theme_after_topic_content' ); ?>
</div>
