I have been struggling with an issue where we have strange behavior using ISE 2.2 for our web-auth and guest registration. The issue occurs with Apple IOS devices and is related to the CNA mini browser popup whereby it will open briefly and display the login/registration page but then closes abruptly. The client will disconnect and reconnect and the captive portal window will open again and stay open allowing registration and/or login. However, upon successful authentication the window closes abruptly and never shows the success page, or the redirect depending on how I've got it configured. It works sometimes - 1 out of 10 maybe. I only have this behavior using apple IOS devices. Does anybody else see this behavior?   Does anyone use ISE for guest or BYOD with web-auth successfully (with respect to apple devices and captive portal?) I have a TAC case open but its slow going.   For reference, if I configure a WLAN with native meraki web-auth the issue does not occur and works just fine. So it has something to do with ISE although per Cisco the ISE configuration is correct.     ... View more