So far have not been able to consistently reproduce this. It happens about a quarter of the time based on testing, but nothing I have been able to find consistently causes it to happen.
All I am doing is going to Manage Virtual Server > Change Domain Name, updating the New Domain Name and clicking Rename Now.
● webmin.service - Webmin server daemon
Loaded: loaded (/usr/lib/systemd/system/webmin.service; enabled; preset: disabled)
Active: active (running) since Fri 2025-11-21 10:08:43 EST; 39min ago
Process: 146088 ExecStart=/usr/libexec/webmin/miniserv.pl /etc/webmin/miniserv.conf (code=exited, status=0/SUCCESS)
Main PID: 146091 (miniserv.pl)
Tasks: 1 (limit: 203448)
Memory: 99.5M (peak: 303.8M)
CPU: 2min 15.353s
CGroup: /system.slice/webmin.service
└─146091 /usr/bin/perl /usr/libexec/webmin/miniserv.pl /etc/webmin/miniserv.conf
Just the miniserv.pl process running under webmin