Webmin update changes ports in Apache

I have a proxy server in front of Apache. Virtualmin knows about this configuration because I changed the listen ports inside Virtualmin interface. Then I changed ports in /etc/apache2/ports.conf too. Everything worked perfect before updating Webmin to 1.770. After updating Webmin apache2 service did not start. I have experience with this issue. It was easy modifying again ports and NameVirtualHost in apache2.conf then restarting the service.



One more issue related to this update. It was for the first time when I updated Webmin from its interface pushing a button in Statistics page. In Debian apt-get update && apt-get upgrade did not show any upgrades. Is this a new behavior for updating Webmin/Virtualmin?

Webmin doesn't touch the Apache config on upgrade though..