[Bug]: Can't login with passkey for non-admin user

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

I added the same passkey to the Nextcloud admin account and another user successfully.
I can login with a device to the admin account fine however if I tried the same for the non-admin user I get:
Your account is not setup for passwordless login.

Steps to reproduce

1. Add a passkey to the admin user.
2. Add the same passkey to a non-admin user.
3. Try to login with a device to the non-admin user.

Expected behavior

It should login with a device normally.

Nextcloud Server version

33

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Nginx

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Enabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response

Start by reproducing the passkey login flow described for an admin and a non-admin user on Nextcloud Server 33. No source files, tests, logs, or configuration details are provided, so trace the passwordless-login failure and define completion as successful passkey login for the non-admin account without breaking the admin flow.