New calendar entry last sunday of month does not work

Nextcloud version 29.0.7 running on raspberry raspbian bullseye 32bit, uptodate
Apache 2.4.62
PHP version 8.1

I’m trying to enter a calendar entry: last sunday of october, for example this years end of daylight saving time, repeatable every year. After submitting, the entry vanishes, i.e. it’s not show in the calendar, but seems to be there. I had this working in the past.

I tried to reproduce but I manage to create a event that takes place every year on the last Saturday in November. I’m on NC 29.0.9.

In the browser console you can check in the network tab, if all request are handled without error. In case of an error, you should also take a look in the log files on the server side.