Items are not selected

Hello.
Items are not filtered for some values of attribute(It is brand), but items has brand.

https://prnt.sc/y9fn62 – URL has $_GET parameter, but message says, that “items not found”.

I print hook “filter_berocket_aapf_listener_taxonomies” in screen. For some reason, the array (pa_proizvoditel) is empty. In page filtered with other brand, this array has term_id of current brand.
Why is this array empty?

So far I have applied this code (but It’s no good):

function filter_berocket_aapf_listener_taxonomies( $taxonomies ) { 
    if($taxonomies['pa_proizvoditel'] && !$taxonomies['pa_proizvoditel'][0]) {
    	$pa_proizvoditel = get_filtered_brand(); // get info for ?filters=proizvoditel[brand_name] with get_terms
    	$taxonomies['pa_proizvoditel'][0] = $pa_proizvoditel->term_id;
    }
    return $taxonomies; 
}; 
// add the filter 
add_filter( 'berocket_aapf_listener_taxonomies', 'filter_berocket_aapf_listener_taxonomies', 10, 1 ); 

This page:
https://profil21.ru/product-category/bread/mukoproseivateli/?filters=proizvoditel%5Bponimak%5D