The Order processor caches calculated bundle prices

Invalidating the cache tags on the $parent_variation at the beginning of the calculateBundlePrice function in VadoOrderProcessor seems to help:

  /**
   * Calculates the bundle price for the calculated price formatter.
   *
   * @param \Drupal\commerce_order\Entity\OrderItemInterface $order_item
   *   The order item.
   */
  protected function calculateBundlePrice(OrderItemInterface $order_item) {
    $parent_variation = $order_item->getPurchasedEntity();
    if (!$parent_variation) {
      return;
    }
    Cache::invalidateTags($parent_variation->getCacheTags());

Then when loading a new page you see the change, but not on refreshing the same page.