Why does the old order amount appear in fragments?

Question

WooCommerce

I delete all applied coupons by ajax request with this code. But for some reason, the amount that comes in the answer remains the old one - with the applied coupon.

function ajax_remove_coupon() {
  global $woocommerce;
  WC()->cart->remove_coupons();
  WC_AJAX::get_refreshed_fragments();
  exit;
}