During the testing of the login form, QA finds out that the first time the user can log in, but every other login attempt from another computer leads…

When QA encounters issues with login persistence across multiple computers, where subsequent logins lead to a redirection and an emptied basket, the likely culprit could be unintended caching of login-related pages or processes. In Salesforce B2C Commerce, certain cache settings might inadvertently cause user sessions to be shared or not properly invalidated. The recommendation D, to check the login form and related templates for caching directives that might be erroneously caching login actions or user-specific data, addresses this potential issue. Developers should ensure that pages handling user sessions and authentication are configured to disable caching, thus preventing session data from being mistakenly retained or shared across different users.