new transparent appointment entries

[mokkin]

Steps to reproduce

Since a couple of days Nextcloud is creating transparent appointment entries below some original appointments. Just have a look at the screenshot.

Expected behavior

There should be only the original visible

Actual behaviour

see screenshot

Calendar app version

3.4.1

CalDAV-clients used

No response

Browser

Firefox 101.0.1

Client operating system

Ubuntu 20.04

Server operating system

Ubuntu 20.04

Web server

No response

Database engine version

No response

PHP engine version

No response

Nextcloud version

No response

Updated from an older installed version or fresh install

No response

List of activated apps

Enabled:
  - accessibility: 1.10.0
  - activity: 2.16.0
  - admin_audit: 1.14.0
  - bbb: 2.2.0
  - bookmarks: 10.5.1
  - bruteforcesettings: 2.4.0
  - calendar: 3.4.1
  - circles: 24.0.0
  - cloud_federation_api: 1.7.0
  - collectives: 1.2.1
  - comments: 1.14.0
  - contacts: 4.1.1
  - contactsinteraction: 1.5.0
  - dashboard: 7.4.0
  - dav: 1.22.0
  - deck: 1.7.1
  - federatedfilesharing: 1.14.0
  - federation: 1.14.0
  - files: 1.19.0
  - files_external: 1.16.1
  - files_pdfviewer: 2.5.0
  - files_rightclick: 1.3.0
  - files_sharing: 1.16.2
  - files_trashbin: 1.14.0
  - files_versions: 1.17.0
  - files_videoplayer: 1.13.0
  - firstrunwizard: 2.13.0
  - groupfolders: 12.0.1
  - impersonate: 1.11.0
  - issuetemplate: 0.7.0
  - logreader: 2.9.0
  - lookup_server_connector: 1.12.0
  - nextcloud_announcements: 1.13.0
  - notes: 4.3.1
  - notifications: 2.12.0
  - oauth2: 1.12.0
  - password_policy: 1.14.0
  - passwords: 2022.6.20
  - photos: 1.6.0
  - polls: 3.7.0
  - previewgenerator: 5.0.0
  - privacy: 1.8.0
  - provisioning_api: 1.14.0
  - recommendations: 1.3.0
  - richdocuments: 6.1.0
  - richdocumentscode: 22.5.301
  - serverinfo: 1.14.0
  - settings: 1.6.0
  - sharebymail: 1.14.0
  - spreed: 14.0.2
  - support: 1.7.0
  - survey_client: 1.12.0
  - systemtags: 1.14.0
  - tasks: 0.14.4
  - text: 3.5.1
  - theming: 1.15.0
  - twofactor_backupcodes: 1.13.0
  - updatenotification: 1.14.0
  - user_status: 1.4.0
  - viewer: 1.8.0
  - weather_status: 1.4.0
  - workflowengine: 2.6.0
Disabled:
  - calendar_resource_management: 0.1.0-alpha2
  - encryption
  - files_fulltextsearch: 24.0.0
  - files_fulltextsearch_tesseract: 24.0.0
  - fulltextsearch: 24.0.0
  - fulltextsearch_elasticsearch: 24.0.0
  - guests: 2.2.0
  - integration_whiteboard: 0.0.15
  - user_ldap

Nextcloud configuration

{
    "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***",
        "overwrite.cli.url": "https:\/\/***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "24.0.2.1",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "default_language": "de",
        "logtimezone": "Europe\/Berlin",
        "installed": true,
        "maintenance": false,
        "mail_smtpmode": "smtp",
        "mail_smtpsecure": "ssl",
        "mail_smtpauth": 1,
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpport": "465",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "app.mail.server-side-cache.enabled": true,
        "preview_max_x": "2048",
        "preview_max_y": "2048",
        "jpeg_quality": "60",
        "enabledPreviewProviders": {
            "1": "OC\\Preview\\Image",
            "2": "OC\\Preview\\MarkDown",
            "3": "OC\\Preview\\MP3",
            "4": "OC\\Preview\\TXT",
            "6": "OC\\Preview\\Movie"
        },
        "enable_previews": true,
        "theme": "",
        "loglevel": 1,
        "trashbin_retention_obligation": "auto",
        "updatechecker": false,
        "mysql.utf8mb4": true,
        "htaccess.IgnoreFrontController": true,
        "htaccess.RewriteBase": "\/",
        "updater.release.channel": "stable",
        "app_install_overwrite": [
            "occweb",
            "issuetemplate",
            "bbb"
        ],
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0
        },
        "default_phone_region": "DE",
        "mail_sendmailmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***"
    }
}

Web server error log

No response

Log file

No response

Browser log

No response

Additional info

[tcitworld]

Duplicate from #4332