Routing access denied after checkout review

When a user checks out, Stripe will accept and process the payment. But then the order is not completed on the Drupal side. Routing access is denied.

SYSLOG
Feb 10 18:23:51 https://mysite.org|1739229831|access denied|66.30.15.6|https://mysite.org/checkout/15306/review|https://mysite.org/checkout/15306/review|0||Path: /checkout/15306/review. Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException: in Drupal\Core\Routing\AccessAwareRouter->checkAccess() (line 120 of /home/mysite/public_html/web/core/lib/Drupal/Core/Routing/AccessAwareRouter.php).

This occurs when an anonymous or authenticated user tries to complete the checkout after entering their credit card information. This occurs intermittently.
Drupal 10.4.1
Stripe 8.x-1.2