No fluctuations between the APs at all, less than 1ms and no losses all yesterday.
If there are periods of congestion causing it, it would be easier to pinpoint if I knew how long that light stays flashing after an issue.
It's also odd that if the AP thinks it has an issue, why doesn't it report it to the ZD once it's back to normal? It's not losing a heartbeat on the ZD so it must be a pretty quick outage.