Ads Evading Pi-hole with iOS 27 | Symphonious

Ads Evading Pi-hole with iOS 27

I YOLO installed the iOS 27 beta and noticed ads creeping back into apps that<br>have been clean for years. The Pi-hole was still running<br>and still showing blocked queries — the ads were just loading anyway.

The culprit was &ldquo;Connectivity Assist&rdquo; in the Wi-Fi settings, aka Cellular<br>Fallback. When the Pi-hole blackholes an ad domain the request fails, iOS<br>decides the Wi-Fi must be flaky, and helpfully retries the same request over<br>mobile data — where there&rsquo;s no Pi-hole in the path. So the ad not only loads, it<br>burns through my data allowance to do it.

Flipped the switch off and ads are properly being blocked again.