We been having some issues with upgrading ap zones to version 6.0
Last ap patch is applied (220.127.116.11.3073) but upgrading directly to this seems to cause issues with some of the ap's.
It happens with all type of models R720, R510 etc.. Totally random.
They are upgraded and "up-to-date" in vSZ, but customer complains about connection issues.
Identifying the ap's is actually quite simple, the affected ones show as 2,4 ghz disabled in vSZ.
The fix varies, some we've had to factory reset, flash with standalone firmware and then join them to vSZ again, after they downloaded firmware and joined they are ok. Some of them it's works just by going back to version 18.104.22.168.1026, then do it step by step (5.2.2 -> 22.214.171.124.1594 -> 126.96.36.199.3073).
So we tried to update some zones step by step, but we still got the issue on some ap's.
Some bug when upgrading to version 6 it seems.
Anybody else experienced this? Maybe this will be fixed in patch or newer version?