Airwave audits the controller through SSH and webui , Airwave do auidt through ssh when device goes up/down along with normal schedul audit interval.
WebUI audit trail is expected behaviour, you could try disable prefer AMON vs SNMP setting in AMP Setup > General page and check the status.
Disabling this setting results the client data will update through snmp polling.
Regards,
Pavan
If my post address your query, give kudos :)