WiFi Extender Won’t Connect to Some Apps/Sites

It sounds like the extender isn’t passing traffic through properly, which is why some sites or apps work while others fail. Since everything loads fine on the main router, the problem is likely with how the extender is handling DNS or routing. A quick test is to set your DNS manually on one of the devices to Google (8.8.8.8 / 8.8.4.4) or Cloudflare (1.1.1.1) and see if that helps. Also, make sure the extender is strictly in extender/bridge mode and not trying to work as a second router, because that can create double NAT issues. If you’re noticing that games like Free Fire or tools such as FFH4x won’t connect properly while other apps (like Facebook) do, it’s another sign the extender is interfering with certain HTTPS traffic. In that case, a VPN test can confirm it — if the game or tool works fine through a VPN on the extender connection, the issue is definitely on the extender’s side. Since you’ve already reset and updated the firmware, it could just be a bug with this model, so checking the vendor forums for similar reports might save you some time.