Account not showing accepted calendar events

[31337-4554551n]

Steps to reproduce

1.Have a user on NC send a calendar invite to user X
2.Have user X accept it via email

Expected behavior

Event would show up for the user in
Calendar WebUI
Recent activity in dashboard
Android calendars pulling in events through davx5

Actual behaviour

Event doesn't show up for user X anywhere.
However the sender will still see the event as accepted

This works for all (that I have tested) other users, just not user X.
I can have user A send an event to B and X, and it work perfectly for B.

Or have user X send it to any other user, and it'll show up just fine for that user.

Calendar app version

5.0.1

CalDAV-clients used

Davx5, etar, NextCloud WebUI

Browser

No response

Client operating system

No response

Server operating system

Alpine linux

Web server

Nginx

Database engine version

MariaDB

PHP engine version

PHP 8.2

Nextcloud version

30.0.2

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

[31337-4554551n]

Are there logs I can provide to assist? Nothing appears to be showing up in the regualar logs as I go through the process

[miaulalala]

Does user X have a unique email addres or does he have an email address that is used for someone else as well? Does he accept it from the Mail app, another mail clients integrated iMIP option (ex: Thunderbird resolves invitations and displays integrated buttons at the top of an email) or from the buttons in the Nextcloud- generated email?

[31337-4554551n]

Does user X have a unique email addres or does he have an email address that is used for someone else as well? Does he accept it from the Mail app, another mail clients integrated iMIP option (ex: Thunderbird resolves invitations and displays integrated buttons at the top of an email) or from the buttons in the Nextcloud- generated email?

It's not a unique address, some admin accounts use the same address. But they all work fine, and this account has always worked, these accounts have been in place with their emails for years.
Clicks the accept button in the email from a browser, gets sent to a webpage of nextcloud that says it's been accepted.
I also notice that other accounts don't have to accept in order to see the event. It just comes up in the calendar as unaccepted, and you can accept from the calendar if you want.

[31337-4554551n]

Does user X have a unique email addres or does he have an email address that is used for someone else as well? Does he accept it from the Mail app, another mail clients integrated iMIP option (ex: Thunderbird resolves invitations and displays integrated buttons at the top of an email) or from the buttons in the Nextcloud- generated email?

I have gone through and changed all admin accounts to be userx+uniqueAdminAccountName@gmail.com
leaving the one user userx with userx@gmail.com
It now appears to work as expected.

So I guess the issue is if you have multiple accounts on the same email, calendar events don't work properly. Though they used to for years.

[artfulrobot]

This might be linked #6368