Hi ,  Have you enabled Fast SSID change? If not enable it and doing the vice versa, Also check the IOS version the APPLE devices are using, and update it to the latest that is 10.3.   Lastly remove all the DNS config on the controller, and run it a...

Hi,  Have you configured any DNS parameters in the controller? If not try manually putting the default DNS details in the device itself, it might solve the issue.