EAV Attribute for Customer does not update - website scope issue

[mc-christian]

Preconditions and environment

• Magento version: 2.4.7-p3
• Another website (e.g. Second Website) besides the Main Website.

Steps to reproduce

1. Create a custom EAV attribute for the customer entity. There are many ways to do this, but here's Adobe's Add a custom text field attribute.
2. Make sure the attribute appears: Admin Panel -> Customers -> All Customers -> Click "Edit" on any customer -> Select Account Information; the new attribute should be there.
3. Populate the new attribute with anything and click Save and Continue Edit (this should work).
4. On the Associate to Website dropdown select the "Second Website" and click Save and Continue Edit.
5. Edit the new attribute once again, and click Save and Continue Edit.

Expected result

The new attribute updates its value.

Actual result

The new attribute maintains its previous value set with Main Website scope.

Additional information

Allowing for custom attributes is a basic but powerful feature, and this issue prevents custom attributes from working for customers belonging to any website other than the Main Website.

If it helps, on this Abobe article, it says that "The scope of the Customer custom attribute is Global only, while other entities support the Global, Website, and StoreView scopes." However, I found a reference to the new attribute on the table "customer_eav_attribute_website". I also tried removing the entry from that table but it doesn't fix the issue.

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 @mc-christian. Thank you for your report.
To speed up processing of this issue, make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce.

• For more details, review the Magento Contributor Assistant documentation.
• Add a comment to assign the issue: @magento I am working on this
• To learn more about issue processing workflow, refer to the Code Contributions.

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