middlename('s) not saved for guest accounts

[DRdevil27]

Preconditions and environment

• 2.4.3-p3

Steps to reproduce

checkout as a guest. put a middle name in the field. it is not saved for guest accounts

Expected result

Middle name is saved in quote table and accessible in email template

Actual result

middle name is not saved in quote table and also not accessible in email template

Additional information

my guess is that this should not be "if is null" but "if is not null"
Magento\Quote\Model\QuoteManagement

if ($quote->getBillingAddress()->getMiddlename() === null) {
$quote->setCustomerMiddlename($quote->getBillingAddress()->getMiddlename());
}

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 @DRdevil27. 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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[engcom-Bravo]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @engcom-Bravo. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @engcom-Bravo, here is your Magento Instance: https://8d81be79f2f45db08f3bf54fa991fe6b.instances-prod.magento-community.engineering
Admin access: https://8d81be79f2f45db08f3bf54fa991fe6b.instances-prod.magento-community.engineering/admin_6748
Login: 319c2472
Password: 15a1ae3e3187

[engcom-Bravo]

Hi @DRdevil27,

Thank you for reporting and collaboration.

Verified the issue on Magento 2.4-develop instance and the issue is reproducible.Kindly refer the attached screenshots..

Steps to reproduce

• checkout as a guest. put a middle name in the field. it is not saved for guest accounts

In admin it is showing middle name for the customer.

In Database quote table showing middle name as null value.

Hence Confirming the issue.

Thanks.