WAC720 STILL LOCKING UP - FIRMWARE 3.9.1.13

Hi,

It looks like his problem still persists.

The situation: 2 WAC720 connected in Ensemble mode get locked-up with no known reasons.

There is no any clear pattern when this happens.

The workload is not high, multiple devices like phones and tables from various vendors, couple of computers and that's basically it.

When system hangs - it is not reachable, not responding, most of the lights on the devices are on.

Device does not reply, no wifi traffic transmission.

The firmware version is the latest available.

Client is loosing trust to these devices. 

Is there any fix?

Thank you,

Andrey