[Bug]: Calendar reminders are auto-dismissed

[Fjodor42]

⚠️ 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

For a long time, I have relied upon calendar reminders.

For even longer, I have failed to attend to all reminders within the same day that they were set to "fire".

As of recently, whether or not I dismiss reminders myself, they disappear, seemingly upon roll-over to the next day from the day upon which they "fired".

My assumption would be that it should not need to be said that this is antithetical to the very notion of reminders, but, apparently, such a need has now arisen.

It should be noted, however, that the possibility exists that this, new, behaviour, could be caused by client software, as opposed to Nextcloud Server itself.

In that case, the relevant clients would be Thunderbird and CalDAV connections from Android phones.

Steps to reproduce

1. Create calendar event
2. Set reminders for said event
3. Fail to do whatever the event was about
4. Correctly abstain from dismissing reminder
5. Have reminder auto-dismissed by ways of this bug at EoD
6. Fail to actually do whatever the event was about at a later time, as event was auto-dismissed

Expected behavior

1. Create calendar event
2. Set reminders for said event
3. Fail to do whatever the event was about
4. Correctly abstain from dismissing reminder
5. Be mindful of need to do whatever the event was about, as a consequence of the reminders not having been dismissed
6. Do whatever the event was about at such a time as possible within one's space of possibility
7. Correctly dismiss reminder
8. ?
9. Profit

Nextcloud Server version

32

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

PostgreSQL

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

Updated from a MINOR version (ex. 32.0.1 to 32.0.2)

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": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "hashingCost": 10,
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
        "version": "32.0.3.2",
        "dbtype": "pgsql",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "logtimezone": "UTC",
        "installed": true,
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.local": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0
        },
        "maintenance": false,
        "loglevel": 2,
        "logfile": "\/var\/log\/nextcloud\/nextcloud.log",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "overwritehost": "***REMOVED SENSITIVE VALUE***",
        "overwriteprotocol": "https",
        "overwritecondaddr": "^195\\.201\\.133\\.130$",
        "enable_previews": true,
        "updatechecker": true,
        "htaccess.RewriteBase": "\/",
        "theme": "",
        "updater.release.channel": "stable",
        "app_install_overwrite": [],
        "default_phone_region": "ISO 3166-2:DK",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "maintenance_window_start": 1
    }
}

List of activated Apps

Enabled:
  - activity: 5.0.0-dev.0
  - admin_audit: 1.22.0
  - app_api: 32.0.0
  - bruteforcesettings: 5.0.0-dev.0
  - calendar: 6.1.2
  - circles: 32.0.0
  - cloud_federation_api: 1.16.0
  - comments: 1.22.0
  - contacts: 8.1.2
  - contactsinteraction: 1.13.1
  - dashboard: 7.12.0
  - dav: 1.34.2
  - deck: 1.16.2
  - federatedfilesharing: 1.22.0
  - federation: 1.22.0
  - files: 2.4.0
  - files_downloadlimit: 5.0.0-dev.0
  - files_external: 1.24.0
  - files_pdfviewer: 5.0.0-dev.0
  - files_reminders: 1.5.0
  - files_sharing: 1.24.1
  - files_trashbin: 1.22.0
  - files_versions: 1.25.0
  - firstrunwizard: 5.0.0-dev.0
  - logreader: 5.0.0-dev.0
  - lookup_server_connector: 1.20.0
  - nextcloud_announcements: 4.0.0-dev.0
  - notifications: 5.0.0-dev.0
  - notify_push: 1.2.1
  - oauth2: 1.20.0
  - password_policy: 4.0.0-dev.0
  - photos: 5.0.0-dev.1
  - privacy: 4.0.0-dev.0
  - profile: 1.1.0
  - provisioning_api: 1.22.0
  - recommendations: 5.0.0-dev.0
  - related_resources: 3.0.0-dev.0
  - serverinfo: 4.0.0-dev.0
  - settings: 1.15.1
  - sharebymail: 1.22.0
  - socialsharing_bluesky: 4.0.1
  - socialsharing_facebook: 4.0.1
  - socialsharing_twitter: 4.0.1
  - spreed: 22.0.7
  - support: 4.0.0-dev.0
  - survey_client: 4.0.0-dev.0
  - systemtags: 1.22.0
  - text: 6.0.1
  - theming: 2.7.0
  - twofactor_backupcodes: 1.21.0
  - updatenotification: 1.22.0
  - user_status: 1.12.0
  - viewer: 5.0.0-dev.0
  - weather_status: 1.12.0
  - webhook_listeners: 1.3.0
  - workflowengine: 2.14.0
Disabled:
  - encryption: 2.20.0 (installed 2.10.0)
  - suspicious_login: 10.0.0-dev.0 (installed 4.2.1)
  - twofactor_nextcloud_notification: 6.0.0-dev.0
  - twofactor_totp: 14.0.0
  - user_ldap: 1.23.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

Will do so if deemed relevant by developers

Additional info

No response