I also have issue with Wi-Fi. Status bar says it is connected and with internet, but none of the apps seem to be able to connect to the internet. The moment I disable Wi-Fi, all apps start working again, and if I turn on Wi-Fi again I have to force close an app for it to star using the Wi-Fi connection again like it normally would. Sometimes just force closing the app is enough for it to use Wi-Fi again without needing to turn it off first. I have my home network setup with a 2.4 and 5 Ghz using the same SSID so the phone chooses automatically between them, maybe that's the issue!? I would like to do further debugging but didn't have the time yet.