I'll join this thread.
We have a 45-day old iAP cluster with 48 iAP305/365 in one of our warehouses.
Other times I have looked at the AP list in the VC GUI and not noticed anything amiss, but I wasn't looking for APs in monitor mode, so I don't know when they stared.
Yesterday I received complaints of poor coverage in a particular area of our warehouse.
I looked at the AP list and noticed that the two APs in that area were both in monitor mode - which would result in poor coverage:
Yesterday AP 50 and 51 were in monitor mode so I rebooted them, today just 51 is in monitor mode.
What causes them to do that, how can I control it?