
PSA to iOS 27 users: Connectivity Assist
In iOS 27, "Wi-Fi Assist" has been renamed "Connectivity Assist." If you had Wi-Fi Assist turned on, Connectivity Assist will be enabled by default.
This feature will send DNS requests over cellular data, which can bypass rules and features such as Ad Block.
You can disable Connectivity Assist in your global Wi-Fi settings, but if you want to disable it locally, you can turn it off for that particular network.
For more details, see: https://help.firewalla.com/hc/en-us/articles/29655921011347-What-to-do-if-Firewalla-s-blocking-features-aren-t-working#h_01M3WT02BZ7NW234Q1A6ZF4TR9