Embedded browser login or automatic login does not open on Apple Phones when few Apple websites (like captive.apple.com) are whitelisted . Could you please send us the tech-support file of AP to Sandeshkumar.B@cambiumnetworks.com so that we can debug further
Are you using cnMaestro cloud based captive portal or AP onboard captive portal or AP integrated with some external captive portal? Also details on the iphone model and OS version will also help us to replicate the issue locally. Based on the message seen on iphone it looks like that iphone is having WiFi connectivity issue with the AP. If you are using cnMaestro cloud then please send us an invite to the account along with the AP on which the issue is seen so that we can do some live debugging on it.
I will send a separate message with other details.
Seeing similar issues. Even when checking 'Bypass Captive Portal Detection' iphones in my office connect to the SSID then when the user opens a web browser it spins. The only way to be presented with the captive portal is to enter a url that the phone hasn't visited.
I have sent you a private message for information on inviting me to your account. We will cross validate this on our end with various IOS devices and with latest IOS firmware and try to recreate this issue. Once I have access to your account I will be able to analyze better your network and see if IOS devices are roaming between guest and non guest network, etc. IOS devices tend to use the DNS entries in it's DNS cache beyond the DNS expiry time and lot of time don't send a DNS query out which also matches with your observation on trying a new website on which it starts working. AP tends to cache the DNS to IP mapping for a longer timer to take care of these cases. If you are running on premesis version of cnMaestro then please email me the techsupport from the AP.