Editing / Deleting one occurrence of a recurring calendar event → 2nd invitation IMIT mail is very confusing

[kusmi]

Steps to reproduce

1. Set a new recurring calendar event (e.g. starting from June 1, 10:00, every week)
2. Add an external attendee and click save
3. Normal invitation email is sent out → all ok
4. Reschedule a single occurrence (e.g. move the June 22, 10:00 event to 15:00) and save
5. Another email notification is sent out, but the text is very confusing: "You have been invited to ... June 1, 10:00) - so the old date is still displayed in email, no mention of the rescheduling of the June 22 event.

Expected behaviour

Second notification email should state, that the June 22 event has been rescheduled.

Actual behaviour

Second notification email does not display the rescheduled date/time. Instead the same email is sent out as in original notification email (just without accept button)

Calendar app

Calendar app version: 2.0.3

CalDAV-clients used: It happens with Nextcloud webversion, as well if I reschedule on CalDAV-clients (e.g. macOS Calendar app)

Client configuration

Browser: Safari 13.1.1 (15609.2.9.1.2)

Operating system: macOS 10.15.5 (19F101)

Server configuration

Operating system: Hetzner NextCloud

Web server: Hetzner NextCloud

Database: mysql 10.3.23

PHP version: 7.3.17

Nextcloud Version: 18.0.4

Updated from an older installed version or fresh install: Updated from 17 - but long time ago

[nickvergessen]

An attempt to fix this was done in #13892 already.
It improved the situation a bit, but still fails partly as:

• It would always show the next occurrence (✅ if all future occurrences are modified, ❌ when only some future occurrences are modified)
• It should should the one modified occurrence that when only one was changed instead of all future occurrences after X

[goodfrank]

What's the status of this issue?

[szaimen]

Hi, please update to 24.0.8 or better 25.0.2 and report back if it fixes the issue. Thank you!

[nickvergessen]

Yes, every day

[SebastianKrupinski]

Duplicate of #38686