As replied, we did upgrade to 5.01 but problem still happen.
its happen to about all the sw in the network if there a reboot on the sw (5 - 7 switches per sites).
The sw is in sync after upgrade fw. or after reboot
The lack of synchronization only occurred in my case on 1028 with automatic device recognition set. After restarting, older versions of the software always showed not in sync. I had to manually force synchronization.
There were only cameras on these switches.
Thanks lady.m3lody for the update. My understanding is that you are still seeing 1-2 APs offline after switch running 5.0.1 reboots. The symptom is present on several switches.
There’s just one weird problem left
On most 2052s it is not possible to display the current configuration.
It throws an error 
Executing the sh command… works fine
Do you have large number of VLANs? Can you raise a support ticket and attach the ex2052’s running-config? We’ll try to reproduce it with the same config. Thanks.
There are a total of 5 2052 devices there.
All configured as one group.
Each has a similar number of VLANs, approximately 15-20
2 devices show configurations, 3 do not show
Such a surprise.
This only happens via cnMaestro, from the sh running-config command line it works instantly
I guess it’s a surprise in cnMestro more than in the switch
I can take a look if you invite me (tng100@cambiumnetworks.com) as Administrator in your cnmaestro account?