My Firefox on iOS shows the red padlock icon (not secure) while the pages are loading on the Verizon network. It doesn't occur if I switch to my home WiFi. First, I thought maybe it's a mixed content website (e.g. page with HTTP resources in it); however, the same thing happens on every Google search. It shows the red padlock until the page is fully loaded and then turns into secure padlock. - WiFi with 1.1.1.1 DNS -> secure padlock - Cellular network(*) -> red padlock - Cellular network(*) + 1.1.1.1 app in full VPN mode -> secure padlock - Cellular network(*) + 1.1.1.1 app in only DNS mode -> secure padlock If this is expected and the intent is to show that the DNS queries that are happening while the page is loading are not secure and causing a gap in the security, there should be another state of the icon (e.g. yellow icon) or a popup that explains it. It currently is not self-explanatory. *Cellular network: Verizon 5G network