Going through the checkout as anonymous user (Guest checkout), I get the following Warning, when submitting the "order_information" step form:
Warning: Undefined property: Drupal\commerce_checkout\Plugin\Commerce\CheckoutFlow\MultistepDefault::$order in Drupal\commerce_checkout\Plugin\Commerce\CheckoutFlow\CheckoutFlowBase->getOrder() (line 167 of modules/contrib/commerce/modules/checkout/src/Plugin/Commerce/CheckoutFlow/CheckoutFlowBase.php).
We're using commerce_shipping, so I'm unsure if this is a commerce_shipping issue and related to the AJAX calls in the background or a Commerce issue. Any ideas how that could happen?
Active
3.0
Checkout
fixed the issue and created MR, please review it once
Sadly I don't think you catched the root cause and the tests fail.
Issue still exists, just found it in the logs of a client. Someone experienced that in checkout.