BuddyPress.org

I followed this topic to list my members alphabetically by their last name: https://buddypress.org/support/topic/sort-user-list-by-last-name/

I changed :

<?php if ( bp_has_members( bp_ajax_querystring( 'members' ) ) ) : ?>

To this:

 <?php if ( bp_has_members( bp_ajax_querystring( 'members' ).'&type=alphabetical' ).'&exclude=1,4,3,5,512 ' ) : ?>

And then Added this to my child theme functions.php

function alphabetize_by_last_name( $bp_user_query ) {
    if ( 'alphabetical' == $bp_user_query->query_vars['type'] )
        $bp_user_query->uid_clauses['orderby'] = "ORDER BY substring_index(u.display_name, ' ', -1)";
}
add_action ( 'bp_pre_user_query', 'alphabetize_by_last_name' );

For some reason this brakes the Order by filter, does anyone know if there is a way of fixing this.