Woocommerce price sorting not working - php

Question

Almost all the guides to implement price sorting on woocommerce site are the same. I've tried two main ways. 1st - hooked up my query args from functions.php like this:
add_filter('woocommerce_get_catalog_ordering_args', 'my_custom_woocommerce_catalog_orderby');
function my_custom_woocommerce_catalog_orderby( $args ) {
if(isset($_GET['sort'])){
if($_GET['sort_by'] == 'by_rating'){
$args['meta_key'] = '_wc_average_rating';
} else if($_GET['sort_by'] == 'by_price') {
$args['meta_key'] = '_price';
}
$args['orderby'] = 'meta_value_num';
$args['order'] = strtoupper($_GET['sort']);
}
return $args;
}
var_dump shows that it has been catched:
array(3) { ["orderby"]=> string(14) "meta_value_num" ["order"]=> string(4) "DESC" ["meta_key"]=> string(6) "_price" }
But products are still sorted by default woocommerce setting (price, asc).
Then i implemented my filter plugin (which is working pretty well) and tried to add this sorting query to it.
class My_blah_blah_filter {
public static $instance;
public $productquery;
public static function init() {
if ( is_null( self::$instance ) ) {
self::$instance = new My_blah_blah_filter ();
}
return self::$instance;
}
private function __construct() {
add_action( 'woocommerce_product_query', [ $this, 'filter_by_current_range' ] );
}
public function filter_by_current_range( $query ) {
$this->productquery = $query;
$query->set('tax_query', $this->get_tax_query());
if(isset($_GET['sort'])){
if($_GET['sort_by'] == 'by_rating'){
$query->set('meta_key', '_wc_average_rating');
} else if($_GET['sort_by'] == 'by_price') {
$query->set('meta_key', '_price');
} else {
$query->set('meta_key', '_price');
}
$query->set('orderby', 'meta_value_num');
$query->set('order', strtoupper($_GET['sort']));
}
}
public function get_tax_query() {
// pa_space-overall
$tax_query = [];
if( isset( $_GET['max_so'] ) && isset( $_GET['min_so'] ) ) {
$terms = get_terms([
'taxonomy' => 'pa_space-overall',
]);
$rlt = [];
foreach( $terms as $term ) {
if( (int) $term->name <= (int) $_GET['max_so'] && (int) $term->name >= (int) $_GET['min_so'] ) {
$rlt[] = $term->term_id;
}
}
$tax_query = [
'relation' => 'AND',
[
'taxonomy' => 'pa_space-overall',
'terms' => $rlt,
'operator' => 'IN',
],
];
}
if( isset( $this->productquery->tax_query ) ) {
$tax_query = array_merge( $this->productquery->query_vars['tax_query'], $tax_query );
}
return $tax_query;
}
Some stuff here is hardcoded, but its not the case, its working. But not the ordering. Its still being catched, added to query, but order is default anyways (price, asc - from woocommerce settings)
The only plugin except woocommerce - is advanced custom fields, which has nothing to do with it.
Cant find any solution anywhere else. Any suggestions? Thanks in advance.
Sorry for poor english or not-perfectly-formatted code