dropdown post counts with pre_get_posts

Hi Guys.

I’ve got a WordPress site where i’m using Beautiful custom taxonomy filters with a particular custom post type, These posts are also assigned with a particular meta value based on a ‘type’.

By setting a session variable on each of these sub-pages that matches the meta value, I can filter through only the posts that contain that meta, Using the code below in functions.php

function thisCategory( $query ) {
if ( is_admin() || ! $query->is_main_query() )
return;

if ( is_post_type_archive( 'knowledge-center' ) ) {
$cat = $_SESSION['kc-sub'];
$metaquery = array(
array(
                               'key' => 'type', // name of custom field
                               'value' => $cat,
                               'compare' => 'LIKE',

                                ),
                            );
            if ( isset($_SESSION["kc-sub"]) ) {
            $query->set( 'meta_query',$metaquery);
            return;
            } else {

            }
        }
    }
    add_action( 'pre_get_posts', 'thisCategory', 1 );

But the only issue i’m having now, is the Dropdowns for the plugin, their still looking throughout the whole CPT – So i’m getting post counts for all posts registered within the selected taxonomy/taxonomies.

What i’m trying to achieve is to have the dropdowns query that taxonomy, within posts that have a meta value of my session, So we can get accurate post counts displayed.

I’ve been looking at the filter “beautiful_filters_dropdown_categories” (https://wordpress.org/plugins/beautiful-taxonomy-filters/other_notes/) which can manipulate wp_dropdown_categories, but i’m having strange results of all dropdowns displaying the same values using this method.

If anyone can shed any light on this or point me in the right direction, it’d be much appreciated!

Thanks!