[Appointments] When editing an appointment, saved setting of "After the event" is not displayed as current setting

Steps to reproduce

1. Create a new appointment, set as you like an "After the event" to e.g. 30 Minutes, save it
2. Re-Edit that appointment, check the initial setting of "After the event"

Expected behavior

The edit overlay should be initialized with all previously set parameters.

Actual behaviour

The edit overlay does not load or display the (until then correctly set) setting for "After the event":

Calendar app version

3.1.0

CalDAV-clients used

Webinterface only

Browser

Firefox 97.0.1

Client operating system

Arch Linux

Server operating system

Arch Linux

Web server

Nginx

Database engine version

MariaDB

PHP engine version

PHP 8.0

Nextcloud version

23.0.2

Updated from an older installed version or fresh install

Updated from an older version

List of activated apps

No response

Nextcloud configuration

No response

Web server error log

No response

Log file

No response

Browser log

No response

Additional info

No response

Start by reproducing the issue in the web interface: create an appointment with an “After the event” value, save it, and reopen the appointment. Trace the edit overlay’s handling of that setting and verify that the previously saved value is displayed when editing.