I'm not sure if you managed to try to fix the ticket #4000. I've retested it, and unfortunately it's not working yet.
Thanks for having a view on it. Could it be solved this year, as a christmas presest?

https://compojoom.com/support/support-tickets/matukio/4000-organizers-field-of-an-event-shows-joomla-account-instead-of-organizers
Thanks,
Marci