Calendar Widget is showing events from a "turned off" calendar

[estux]

Steps to reproduce

1. Go to the Calendar module
2. Turn off the visibility of one calendar (by clicking on the color circle of the calendar)
3. Go back to Dashboard (which has the Calendar Widget already active)
4. See Next events also from that "turned off" calendar.

Expected behavior

If I turn off the visibility of one calendar this should mean I also prefer to not see its events in the widget.

Actual behaviour

In the Widget I'm seeing events from "turned off" calendars.

Calendar app version

4.7.8

CalDAV-clients used

DAVx5

Browser

Firefox 127

Client operating system

Windows 10

Server operating system

Linux 5.15.149-1-pve x86_64

Web server

Nginx

Database engine version

MySQL

PHP engine version

PHP 8.2

Nextcloud version

28.0.7

Updated from an older installed version or fresh install

Updated from an older version

List of activated apps

Enabled:
 - activity: 2.20.0
 - bookmarks: 14.2.2
 - bruteforcesettings: 2.8.0
 - calendar: 4.7.8
 - camerarawpreviews: 0.8.5
 - circles: 28.0.0
 - cloud_federation_api: 1.11.0
 - collectives: 2.12.0
 - comments: 1.18.0
 - contacts: 5.5.3
 - contactsinteraction: 1.9.0
 - cospend: 1.6.1
 - dashboard: 7.8.0
 - dav: 1.29.2
 - deck: 1.12.2
 - federatedfilesharing: 1.18.0
 - federation: 1.18.0
 - files: 2.0.0
 - files_pdfviewer: 2.9.0
 - files_reminders: 1.1.0
 - files_sharing: 1.20.0
 - files_trashbin: 1.18.0
 - files_versions: 1.21.0
 - firstrunwizard: 2.17.0
 - forms: 4.2.4
 - groupfolders: 16.0.7
 - guests: 3.0.1
 - impersonate: 1.15.0
 - logreader: 2.13.0
 - lookup_server_connector: 1.16.0
 - maps: 1.4.0
 - nextcloud_announcements: 1.17.0
 - notes: 4.10.0
 - notifications: 2.16.0
 - oauth2: 1.16.3
 - password_policy: 1.18.0
 - photos: 2.4.0
 - polls: 7.1.2
 - privacy: 1.12.0
 - provisioning_api: 1.18.0
 - recommendations: 2.0.0
 - related_resources: 1.3.0
 - richdocuments: 8.3.8
 - serverinfo: 1.18.0
 - settings: 1.10.1
 - sharebymail: 1.18.0
 - spreed: 18.0.9
 - support: 1.11.1
 - survey_client: 1.16.0
 - suspicious_login: 6.0.0
 - systemtags: 1.18.0
 - tables: 0.7.3
 - tasks: 0.16.0
 - text: 3.9.2
 - theming: 2.3.0
 - twofactor_backupcodes: 1.17.0
 - updatenotification: 1.18.0
 - user_status: 1.8.1
 - viewer: 2.2.0
 - weather_status: 1.8.0
 - welcome: 1.1.0
 - workflowengine: 2.10.0
Disabled:
 - admin_audit: 1.10.0
 - encryption
 - files_external
 - files_rightclick: 1.6.0
 - talk_matterbridge: 1.26.0
 - twofactor_totp
 - unsplash: 2.2.1
 - user_ldap

Nextcloud configuration

{
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "trusted_domains": [
        "my domain"
    ],
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "dbtype": "mysql",
    "version": "28.0.7.4",
    "overwrite.cli.url": "https:\/\/my domain",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbport": "",
    "dbtableprefix": "oc_",
    "mysql.utf8mb4": true,
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "installed": true,
    "maintenance": false,
    "loglevel": 0,
    "logtimezone": "Europe\/Paris",
    "filesystem_check_changes": 1,
    "default_language": "it",
    "mail_smtpmode": "sendmail",
    "mail_smtpauthtype": "LOGIN",
    "mail_from_address": "***REMOVED SENSITIVE VALUE***",
    "mail_domain": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpauth": 1,
    "memcache.local": "\\OC\\Memcache\\Redis",
    "redis": {
        "host": "***REMOVED SENSITIVE VALUE***",
        "port": 6379
    },
    "memcache.locking": "\\OC\\Memcache\\Redis",
    "theme": "",
    "default_phone_region": "IT",
    "versions_retention_obligation": "auto,90",
    "trashbin_retention_obligation": "auto,30",
    "maintenance_window_start": 3
}

Web server error log

No response

Log file

No response

Browser log

No response

Additional info

This started to happen after upgrading to Nextcloud 28.0.7 (from Nextcloud 28.0.6) with Calendar version 4.7.6