Can't automatically remove multiple expired promotions

If a cart has multiple expired promotions, they should be removed automatically. However, the following code block causes issues with this:

From commerce/modules/promotion/src/PromotionOrderProcessor.php:

    $coupons_field_list = $order->get('coupons');
    $constraints = $coupons_field_list->validate();
    /** @var \Symfony\Component\Validator\ConstraintViolationInterface $constraint */
    foreach ($constraints as $constraint) {
      list($delta, $property_name) = explode('.', $constraint->getPropertyPath());
      $coupons_field_list->removeItem($delta);
    }

If the promotions with delta 1 and 2 are expired, delta 1 gets removed first. Then, the deltas reset, so there is no longer a delta 2, and when the function attempts to remove the promotion at delta 2, this error gets thrown:

InvalidArgumentException: Unable to remove item at non-existing index. in Drupal\Core\TypedData\Plugin\DataType\ItemList->removeItem() (line 138 of /var/app/current/web/paper/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php).