No more email notification for changes in own calendar

Steps to reproduce

1. Edit your shared calendar

Expected behaviour

All users (including the one editing his calendar) should get an email notification about the change.

Actual behaviour

Owner of the calendar gets no more email notification.

Server configuration

Operating system:
Ubuntu Server 20.04.4 LTS
Web server:
Apache2
Database:
MySQL
PHP version:
7.4
Nextcloud version:
24.0.3

Upgraded from NC17 to 24.0.3 a few days ago.
We used email notifications to inform users about changes in shared calendars and also sent an email notification to the user responsible for the change as the calendars are synced and worked upon on cell phones. The email to the editing user was sent as confirmation that syncing to the server has worked fine.
The checkbox for email notifications for own actions is missing in settings now and notifications are only sent to all other users except the one editing his own calendar.
Is there a way to get back mail notification for the editing user?
If so - how?

Start by reproducing the shared-calendar edit on Nextcloud 24.0.3 with the reported configuration, comparing email delivery for the owner and other users. The issue is done when the user who makes the calendar change also receives the expected email notification.