[Bug]: Accounts missing in "People" filter on "Shared with others" page

⚠️ 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

Trying to use the "People" filter in "Shared with others", only shows the the first Account I shared the file with.
I have a Test-File which is shared with 3 other Accounts. Only the first Account I shared the file with is shown. When adding or removing a share from this view, the list is properly updated, until the next refresh.

Steps to reproduce

1. Share a file with at least two other users
2. Go to "Shared with others"
3. Click on the "People" filter
4. Only my own user and the first user the file got shared with is shown

Expected behavior

All users I have shared files with should be shown in the filter.

Nextcloud Server version

31

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.4

Web server

Apache (supported)

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 Disabled

What user-backends are you using?

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

Configuration report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***",
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "31.0.5.1",
        "overwrite.cli.url": "http:\/\/***REMOVED SENSITIVE VALUE***",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "default_phone_region": "DE",
        "htaccess.RewriteBase": "\/",
        "lost_password_link": "disabled",
        "skeletondirectory": "",
        "maintenance_window_start": 1,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "maintenance": false,
        "loglevel": 2,
        "theme": ""
    }
}

List of activated Apps

- activity: 4.0.0
  - announcementcenter: 7.1.3
  - app_api: 5.0.2
  - appointments: 2.4.5
  - bruteforcesettings: 4.0.0
  - calendar: 5.3.1
  - circles: 31.0.0
  - cloud_federation_api: 1.14.0
  - collectives: 2.17.1
  - comments: 1.21.0
  - contactsinteraction: 1.12.0
  - dashboard: 7.11.0
  - dav: 1.33.0
  - deck: 1.15.1
  - federatedfilesharing: 1.21.0
  - federation: 1.21.0
  - files: 2.3.1
  - files_downloadlimit: 4.0.0
  - files_lock: 31.0.2
  - files_reminders: 1.4.0
  - files_sharing: 1.23.1
  - files_trashbin: 1.21.0
  - files_versions: 1.24.0
  - firstrunwizard: 4.0.0
  - forms: 5.1.0
  - groupfolders: 19.1.0
  - guests: 4.2.0
  - impersonate: 2.0.0
  - integration_openproject: 2.9.0
  - logreader: 4.0.0
  - lookup_server_connector: 1.19.0
  - nextcloud_announcements: 3.0.0
  - notifications: 4.0.0
  - notify_push: 1.1.0
  - oauth2: 1.19.1
  - password_policy: 3.0.0
  - photos: 4.0.0-dev.1
  - polls: 7.4.3
  - privacy: 3.0.0
  - profile: 1.0.0
  - provisioning_api: 1.21.0
  - recommendations: 4.0.0
  - related_resources: 2.0.0
  - richdocuments: 8.6.5
  - sendent: 3.0.21
  - serverinfo: 3.0.0
  - settings: 1.14.0
  - sharebymail: 1.21.0
  - spreed: 21.0.4
  - support: 3.0.0
  - survey_client: 3.0.0
  - systemtags: 1.21.1
  - tables: 0.9.3
  - tasks: 0.16.1
  - text: 5.0.0
  - theming: 2.6.1
  - theming_customcss: 1.18.0
  - twofactor_backupcodes: 1.20.0
  - unroundedcorners: 1.1.4
  - updatenotification: 1.21.0
  - user_ldap: 1.22.0
  - user_status: 1.11.0
  - viewer: 4.0.0
  - weather_status: 1.11.0
  - webhook_listeners: 1.2.0
  - workflowengine: 2.13.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

Additional info

No response

Start by reproducing the issue from the Shared with others page: share one file with at least two users, open the People filter, and refresh the page. Trace the filter's data source and verify that every account associated with shared files remains listed after refresh; no source files or tests are identified in the issue.