[Bug]: The default profile picture gets the wrong value (letters) on some pages with OIDC

⚠️ 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

The default profile image letters (that should be first letter from the first two words in the "Display Name") is getting the "Username" instead on some pages when using "OpenID Connect" with Keycloak.

Steps to reproduce

If there is a local user it shows the correct data and I see these are in the "oc_users" table in the database with "Display Name" set.
The users from "OpenID Connect" look like they are in the "oc_user_oidc" table in the database and they have all have "Display Name" set as the users name and "Username" is a GUID.

The pages I've found shows the wrong pictures (and sometimes cache them on other sites) are the following:

• Profile page:

Always shows the username in the picture.
This page also cache:s the wrong image for the local user so it shows wrong on some other pages (For example the picture in top right) until you clean your cache.

Wrong letters (Should be "UA")

The cache:d image in top right: (Correct)

The cache:d image in top right: (Wrong)

• Edit "Personal info" page:

Shows wrong in the top left profile picture but not in the "preview" profile page.
This page also cache:s the wrong image for the local user so it shows wrong on some other pages (For example the picture in top right) until you clean your cache.

Example:

• Contacts page (App):

The default list that gets the users from the system (principals/system/system) is wrong in the initial list (and "Not grouped").

The default contact list:

If you for example create a circle and add members then it is correct there:

Also correct under members list:

Expected behavior

The default profile picture should always use the letters in "Display Name" if it is set.

Nextcloud Server version

30

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Nginx

Database engine version

PostgreSQL

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

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

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

Configuration report

{
    "system": {
        "debug": true,
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "30.0.1.1",
        "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "filelocking.enabled": true,
        "enable_previews": true,
        "enabledPreviewProviders": [
            "OC\\Preview\\PNG",
            "OC\\Preview\\JPEG",
            "OC\\Preview\\GIF",
            "OC\\Preview\\BMP",
            "OC\\Preview\\XBitmap",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\MP3",
            "OC\\Preview\\TXT",
            "OC\\Preview\\Illustrator",
            "OC\\Preview\\Movie",
            "OC\\Preview\\MSOffice2003",
            "OC\\Preview\\MSOffice2007",
            "OC\\Preview\\MSOfficeDoc",
            "OC\\Preview\\OpenDocument",
            "OC\\Preview\\PDF",
            "OC\\Preview\\Photoshop",
            "OC\\Preview\\Postscript",
            "OC\\Preview\\StarOffice",
            "OC\\Preview\\SVG",
            "OC\\Preview\\TIFF",
            "OC\\Preview\\Font"
        ],
        "preview_max_x": 1024,
        "preview_max_y": 768,
        "preview_max_scale_facto": 1,
        "auth.bruteforce.protection.enabled": true,
        "trashbin_retention_obligation": "auto,7",
        "skeletondirectory": "",
        "defaultapp": "",
        "activity_expire_days": 14,
        "integrity.check.disabled": false,
        "updater.release.channel": "beta",
        "theme": "",
        "default_phone_region": "SE",
        "maintenance": false,
        "allow_local_remote_servers": true,
        "oidc_login_auto_redirect": true,
        "oidc_login_redir_fallback": true,
        "default_language": "SE",
        "loglevel": 3,
        "mail_smtpmode": "smtp",
        "mail_smtpsecure": "ssl",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_smtpport": "465",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_send_plaintext_only": true
    }
}

### List of activated Apps

Enabled:
  - activity: 3.0.0
  - admin_audit: 1.20.0
  - app_api: 4.0.0
  - calendar: 5.0.1
  - circles: 30.0.0-dev
  - cloud_federation_api: 1.13.0
  - comments: 1.20.1
  - contacts: 6.1.0
  - contactsinteraction: 1.11.0
  - dashboard: 7.10.0
  - dav: 1.31.1
  - federatedfilesharing: 1.20.0
  - federation: 1.20.0
  - files: 2.2.0
  - files_downloadlimit: 3.0.0
  - files_pdfviewer: 3.0.0
  - files_reminders: 1.3.0
  - files_sharing: 1.22.0
  - files_trashbin: 1.20.1
  - files_versions: 1.23.0
  - groupfolders: 18.0.3
  - logreader: 3.0.0
  - lookup_server_connector: 1.18.0
  - mail: 4.0.1
  - nextcloud_announcements: 2.0.0
  - notifications: 3.0.0
  - oauth2: 1.18.1
  - ocs_api_viewer: 1.0.7
  - onlyoffice: 9.4.0
  - password_policy: 2.0.0
  - photos: 3.0.2
  - privacy: 2.0.0
  - provisioning_api: 1.20.0
  - recommendations: 3.0.0
  - related_resources: 1.5.0
  - richdocuments: 8.5.1
  - serverinfo: 2.0.0
  - settings: 1.13.0
  - sharebymail: 1.20.0
  - spreed: 20.0.1
  - support: 2.0.0
  - systemtags: 1.20.0
  - text: 4.1.0
  - theming: 2.5.0
  - twofactor_backupcodes: 1.19.0
  - updatenotification: 1.20.0
  - user_oidc: 6.0.1
  - user_status: 1.10.0
  - viewer: 3.0.0
  - weather_status: 1.10.0
  - webhook_listeners: 1.1.0-dev
  - workflowengine: 2.12.0
Disabled:
  - bruteforcesettings: 3.0.0 (installed 2.8.0)
  - encryption: 2.18.0
  - files_external: 1.22.0
  - firstrunwizard: 3.0.0 (installed 2.17.0)
  - survey_client: 2.0.0 (installed 1.16.0)
  - suspicious_login: 8.0.0
  - twofactor_nextcloud_notification: 4.0.0
  - twofactor_totp: 12.0.0-dev
  - user_ldap: 1.21.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

No response

Additional info

Do I need to create a bug report in the contact app aswell?

Start by reproducing the profile page, Personal info page, and Contacts page behavior with local and OpenID Connect users, comparing Display Name with the GUID username. Trace how the user_oidc backend supplies profile data and how the profile image is cached. Done means default initials consistently come from Display Name and stale incorrect images are not retained.