Warning: Undefined array key "billing_information"

When updated to latest alpha-3 release, a notice is thrown when going from shipping to review

 Warning: Undefined array key "billing_information" in Drupal\commerce_shipping_same_as_billing\Plugin\Commerce\CheckoutPane\PaymentInformation->validatePaneForm() (line 40 of modules/contrib/commerce_shipping_same_as_billing/src/Plugin/Commerce/CheckoutPane/PaymentInformation.php).