How to fix the WC filter in the admin panel after adding the custom stock_status?

WooCommerce Version: 3.8.1

Through the filter function, added a custom field to stock_status:

add_filter(
  'woocommerce_product_stock_status_options',
  'ec_add_custom_product_stock_status_option'
);
function ec_add_custom_product_stock_status_option ($arr) {
  $arr['fororder'] = __( 'Доступно для заказа', 'woocommerce' );
  return $arr;
}

Everything works well, except for the "stock_status" filter in the admin panel on the "All Products" page. It shows “No Products Found” even for the standard instock option.

For new products, and if I manually, on a new one, set the status of the balance in the product, this product will miraculously get into the filter.

I just don’t understand, maybe im can somehow update the statuses on all products?

What could be the problem?

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