I have another customer face same problem AP not report back to controller, but the environment is different. They relocate the Controller from Location A to Location B. But they doesn't notice some of the AP doesn't report back to controller.
After 2 to 3 days, they relocate back from Location B to Location A. But still some of the AP doesn't report back to the controller (more than 24 hours) until i restart the AP, then AP report back to controller.
My customer want to know why it doesn't automatically connect back to controller. Please advise.