Unleashed AP - Suddenlty Factory Reset

[marco_eichstet1]

Hello,

i have a strange issue which happend two times now.
A few weeks ago Customer told me that two Outdoor-Mesh-APs (T300 Unleashed) are not accessable any more.
We exchanged the APs and Customer shipped the defective APs to me.
I checked the APs. Strange Thing: APs where set to Factory Defaults. There were not defective. After configuring them they worked again without any issues.

Few days ago same issue at this Site but now with two T301s Unleashed.
T301s were not reachable anymore. Customer exchanged the APs and send me the two faulty ones.
After checking the APs, they were Factory Resetted again.

I ask me how the hack the APs can get Factory Resetted by itself?
This APs are mounted at 15m high. Nobody can reach this AP so easily to reset them.
Maybe an consequenz of an thunderstorm? Overload? Can this be possible? Or maybe a wrong grounding?

I don't really have an idea.
Maybe someone else?

Thanks.
KR
Marco

[marco_eichstet1]

Please share your Solution or Result with us if you have some new Information. Thanks.

[marco_eichstet1]

Ticket opened with Case No 00556991

[marco_eichstet1]

Additional Info:
I saw this Problem first with FW 200.4.9.13.47.
Before that i had installed a 200.3 without Factory Resets.

[michael_brado]

Thanks Marco, I added that comment to our bug.

[wopke_weening]

I've seen the same problem with 200.3 sw. 

I only have this experience with T300 meshed networks. This might mean the problem is in the T300 but doesn't have to mean that. We also use R510 UL networks but in those cases the networks are: 1- indoor, 2-fully cabled. So no ceteris paribus comparisons there. 

One thing I also observed is that the "kernel panics" somehow seem to get triggered by "radar detection". The odd thing is that an other network,150 meters away from it doesn't detect radar. As (weather) radars are quite powerful it doesn't make sense that one network does detect radar and the other networks (which are exact copies) do not. I wonder if a false positive on radar detection might trigger a kernel overload?