Bug: do_my_obj_start commented out

Hi,
your very nice plugin stoped working while I was upgrading from version 2.2.10 to 2.2.11 (the notation “{tooltip} …” was not replaced anymore). The reason was, that this line in include/class.front.php was commented out:

// add_action(‘wp’, array( $this, ‘do_my_ob_start’) );

When I delete the “//” it works fine:

add_action(‘wp’, array( $this, ‘do_my_ob_start’) );

Could you fix this in future releases?
Regards
Victorio

PS: Using latest WordPress 5.7