"Accounts" Address Book is not used for auto-completion of email addresses

Steps to reproduce

All internal Nextcloud users are held in an address book called "Accounts". Nextcloud Mail is not querying this "auto created" Accounts Address Group and therefor will not auto-complete the email address for any colleague on the system

1.Open Nextcloud Mail
2.Create a new Email
3.In the To: field enter the name of a colleague that has an account on Nextcloud but that you have never written an email to before in Nextcloud Mail

Expected behavior

To include the "Accounts" Address Book in the search for known contacts and as a result offer me matching records and to auto-fill the To/CC/BCC fields once selected

Actual behavior

All Address Books are searched but not the automatically created "Accounts" Address Book

Mail app version

5.4.0

Nextcloud version

31.0.7

Mailserver or service

Dovecot

Operating system

Debian

PHP engine version

None

Nextcloud memory caching

No response

Web server

None

Database

None

Additional info

This issue has also been logged in the Contacts repository as I am not sure if the issue is originating from the contacts App or if the mail app is not querying the "Accounts" address book.
https://github.com/nextcloud/contacts/issues/4705

The same issue seems to also be present in the calendars repository as the calendar does not show Birthday Dates for contacts in the "Accounts" address book.
https://github.com/nextcloud/calendar/issues/6764