Cannot use login as customer in multisites installations if I open the homepage first

[ioweb-gr]

Preconditions and environment

• 2.4.6-p8

Steps to reproduce

Steps to Replicate the Bug in Magento 2:

1. Set up two websites in Magento 2:

   • Web1: Configure this website under the primary domain. For example, https://primary-domain.com.
   • Web2: Configure this website under a different domain. For example, https://different-domain.com.

2. Create a customer in Web2:

   • Log in to the admin panel.
   • Navigate to Customers > All Customers.
   • Click Add New Customer and ensure the customer is assigned to Web2.

3. Test scenario using the same browser session:

   • Open the admin panel (https://primary-domain.com/admin) and log in as an admin.
   • Open a new tab in the same browser session and navigate to the frontend of Web1 (https://primary-domain.com).

4. Attempt to log in as the customer in Web2 via the backend:

   • In the admin panel, go to Customers > All Customers.
   • Locate the customer created in Web2 and click Login as Customer.
   • Observe the behavior in the frontend of Web1.

Possible Cause:

Magento's session management and customer login mechanisms may conflict due to cross-domain cookies, domain-specific sessions, or scope mismatches between Web1 and Web2.

Expected result

The customer should be logged in successfully in Web2.

Actual result

The customer login fails on the frontend of Web1.

Additional information

No response

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @ioweb-gr. Thank you for your report.
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[m2-assistant]

Hi @engcom-Bravo. Thank you for working on this issue.
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