I see these logs in 18 pieces of AP6532 WING 5.8.6 adopted to VC these logs:
"Jul 16 9:16:27 2017: %DATAPLANE -5-IGMPSNOOP: IP Multicast group <239.255.255.250> Vlan 1 deleted
Jul 16 9:05:24 2017: %DATAPLANE -5-IGMPSNOOP: IP Multicast group <239.255.255.250> Vlan 1 created
Jul 16 8:51:27 2017: %DATAPLANE -5-IGMPSNOOP: IP Multicast group <239.255.255.250> Vlan 1 deleted
Jul 16 8:43:33 2017: %DATAPLANE -5-IGMPSNOOP: IP Multicast group <239.255.255.250> Vlan 1 created"