This article provides a solution for an Adobe Commerce 2.4.0 known issue where payment methods are missing when customers use Return to standard checkout, after they enabled Amazon pay.
Adobe Commerce on-premises and Adobe Commerce on cloud infrastructure v2.3.5.p1 and v2.4.0
Steps to reproduce:
Payment methods should be displayed after restarting checkout.
Payment methods are missing.
A resolution is planned for 2.4.1.