Interference Profile failed

[_Ratha_]

I am using wireless AP 2700 with wireless controller 5508. it operation normally for several months. after that 2 AP show status failed under Interference Profile. Then all client cannot connect to their wireless network.

What cause this problem? How can I prevent that issue? because after I restart WLC it working normally.

Thank for your support

[Leo Laohoo]

And what firmware is the WLC running on? 

[mahmahmah]

In my case 8.5.151, 3 x 3702E, 4, 3802E with 2504 WLC two WLAN´s.