Hi @fliebe92,
Thank you very much for this information about paid services. At the moment we are looking only for one time support. All other issues could be solved by ourselves.
I had done a further debugging session and want to inform about those details:
- I have upgrade to 6.2.0-1709902372.e5509ee8.bookworm
- Zammad worker was running two times. Now it is running only once
- postgresql 15 and 16 were installed. postgresql 16 was removed and 15 is used as before
Created a completely new automation. Automation is shown, that it will be triggered in 18 minutes.
With zammad run rails c and Scheduler.pluck(:last_run) I checked execution. There was an entry for this time. So I guess, that it was executed. I could not find an entry in production.log. After supposed execution, new trigger is not calculated. It should be executed after 10 minutes again.
Existing automations were all shown with an outdated trigger. This means for example, it should be startet 26.2.2024 at 10:30. But it was not executed or the trigger did not get updated.
Edited existing automations and added a new execution time point. In GUI all were show, that they should be executed in some minutes and the amount of affected tickets is updated. Waited and got some new entries in scheduler. No entries in production.log. Trigger is not updated to next planed schedule. Tickets are not worked on.
I hope with this information you can provide further steps for resolving it or I can dig you to the right way 
I created a new backup and will play localy with it.
Best regards and thank you very much.