index.php

<?php

function my_facetwp_is_main_query( $is_main_query, $query ) {
    if ( isset( $query->query_vars['post_type'] ) ) {
        if ( 'edd_wish_list' == $query->query_vars['post_type'] ) {
            $is_main_query = false;
        }
    }
    return $is_main_query;
}
add_filter( 'facetwp_is_main_query', 'my_facetwp_is_main_query', 10, 2 );