Journal looks fine. New entries appear in the output of journalctl -f. Mostly postfix logs, but also ssh sessions, or pmgdaemon sucessful logins, etc.
I noticed this:
Sep 10 11:11:22 bester pmgproxy[88945]: proxy detected vanished client...
Nothing seems to be related directly to me entering the syslog page in UI, but sometimes I can see this:
Sep 08 13:54:58 bester pmgdaemon[40904]: problem with client ::ffff:*MY_IP_ADDRESS*; Broken pipe
Also, when do systemctl restart rsyslog I...
After upgrade from 9.0.6 to 9.1.2 the webgui does not show log anymore. I open "Administration -> Syslog" and the log window is empty.
I still can read /var/log/syslog and the log entries are there. Just the gui does not show them to me. :-(