I’m not sure I understand your answer, but I have COVID-19 right now so my brain is on diminished capacity.
I do not have a static IP. I know it’s heavily advised against by all of Virtualmin documentation, and people who work there doing support, but I don’t have the funds for a static IP yet.
I do have software handling the dynamic IP update for me when it changes on its own now.
This problem I noticed is fairly recent. Adding 127.0.0.1 to Webmin -> Networking -> Network Configuration -> Hostname and DNS Client -> DNS Client Options -> DNS servers:, was persistent until a reboot. Now it reverts to just 127.0.0.53 immediately after saving the setting.