Apple Captive Network Assistant with Sign in with Apple

We're proving a *****-access WiFi network.


• Users select the WiFi hotpsot in Settings > WiFi

• Captive Network Assistant (CNA) tear sheet pops up

• Users click in "Sign in with Apple" button but nothing happens... there's no network outbound traffic (i did a tcpdump).


I already allowed all Apple network traffic and all certificates in my Access Point.


It looks like the CNA (Captive Network Assistant) can not open the pop-up's Sign in with Apple.


In my intense troubleshooting, I could see if the user has a 4G internet, the auth works normally.


Someone already tried to do it?


Sorry about my english.