Variable product visibility in catalog

Hello

i have problem when changing stock status for product variation.
I am using this code in plugin:

$_product_variation->set_stock_status( $stock_status );
wc_update_product_stock( $_product_variation, $stock );
wc_delete_product_transients( $product_variation_id );

Out of stock visibility is set on hide, and manage stock is manage for each product or product variation.

When i set stock status for product variation – outofstock, and qty – 0, everything working fine, variable product is hidden in product catalog.

But, when is product variation set – instock and qty is more than 0, product is stil hidden. I must go into product admin screen and manually hit Update button.

What i am missing?