3702I-E-K9 disconnects from 9800-CL controller

Hi everyone, I am facing a weird issue with my 3702Is and the 9800-CL WLC where the APs work and broadcast, but then disconnect from the WLC with the following error:

*Sep 19 08:40:14.095: %DTLS-5-SEND_ALERT: Send FATAL : Close notify Alert to 10.0.1.1:5246 *Sep 19 08:40:14.099: %DOT11-5-EXPECTED_RADIO_RESET: Restarting Radio interface Dot11Radio1 due to the reason code 27 *Sep 19 08:40:14.211: %CAPWAP-5-AP_EASYADMIN_INFO: AP Easy Admin information - EASY_ADMIN is not set, turn off easy admin service! *Sep 19 08:40:14.211: %CAPWAP-5-AP_EASYADMIN_INFO: AP Easy Admin information - Easy Admin is not enabled, turn it off! *Sep 19 08:40:14.227: %DOT11-5-EXPECTED_RADIO_RESET: Restarting Radio interface Dot11Radio1 due to the reason code 39 *Sep 19 08:40:14.235: %CLEANAIR-6-STATE: Slot 1 down *Sep 19 08:40:14.235: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to administratively down *Sep 19 08:40:14.243: %DOT11-5-EXPECTED_RADIO_RESET: Restarting Radio interface Dot11Radio0 due to the reason code 10 *Sep 19 08:40:14.247: %LINK-6-UPDOWN: Interface Dot11Radio0, changed state to up *Sep 19 08:40:14.851: %DOT11-5-EXPECTED_RADIO_RESET: Restarting Radio interface Dot11Radio1 due to the reason code 10 *Sep 19 08:40:14.875: %LINK-6-UPDOWN: Interface Dot11Radio1, changed state to up *Sep 19 08:40:15.279: %LINK-6-UPDOWN: Interface Dot11Radio1, changed state to down *Sep 19 08:40:15.287: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to reset *Sep 19 08:40:16.271: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio0, changed state to up *Sep 19 08:40:16.279: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio1, changed state to down *Sep 19 08:40:16.315: %LINK-6-UPDOWN: Interface Dot11Radio1, changed state to up *Sep 19 08:40:16.323: %LINK-6-UPDOWN: Interface Dot11Radio0, changed state to down *Sep 19 08:40:16.331: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset *Sep 19 08:40:17.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio1, changed state to up *Sep 19 08:40:17.323: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio0, changed state to down *Sep 19 08:40:17.355: %LINK-6-UPDOWN: Interface Dot11Radio0, changed state to up *Sep 19 08:40:18.355: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio0, changed state to up *Sep 19 08:40:25.000: %CAPWAP-5-DTLSREQSEND: DTLS connection request sent peer_ip: 10.0.1.1 peer_port: 5246 *Sep 19 08:40:25.279: %CAPWAP-5-DTLSREQSUCC: DTLS connection created sucessfully peer_ip: 10.0.1.1 peer_port: 5246 *Sep 19 08:40:25.279: %CAPWAP-5-SENDJOIN: sending Join Request to 10.0.1.1 *Sep 19 08:40:25.319: %DOT11-5-EXPECTED_RADIO_RESET: Restarting Radio interface Dot11Radio0 due to the reason code 27 *Sep 19 08:40:25.331: %CAPWAP-5-JOINEDCONTROLLER: AP has joined controller 

Does anyone have any ideas? It seems to be this close notify alert error. The WLC reports 'DTLS Server Session Error'

Thanks