'journalctl' task filling entire CPU core for minutes

SYSTEM INFORMATION
OS type and version Ubuntu Linux 22.04.5
Webmin version 2.202
Virtualmin version 7.20.2
Webserver version FPM-8.1.29 & FPM-8.3.11
Related packages journalctl / cron

Every couple of minutes, there is a job running that is completely filling one CPU core for a couple of minutes. In HTOP, I can see that the name of the job is:

journalctl -u postfix* -u dovecot* --since 7094778 seconds ago

The weird thing is; I completely ‘removed’ all mail related features in ‘Virtualmin > System Settings > Features and Plugins’ and also disabled them from booting in ‘Webmin > Bootup & Shutdown’ since the creation of this server. This means that postfix and dovecot logs were never accumulated in the first place.

So, why would this job take so long? And can I disable this job? If so, how would I do that?