I received the follwing logs:
Mar 20 20:11:45 SOLID-WIFI syslog: eventd_to_syslog():AP[AP_PISO11@8c:0c:90:33:8b:10] heartbeats lost
Mar 20 19:27:12 SOLID-WIFI syslog: eventd_to_syslog():AP[AP_PISO5@c0:8a:de:35:df:50] detects interference on radio ...