WMS 5.3 205 Issues after upgrading private cloud

Hi.
I'm having some issues after upgrading from 5.2 to 5.3. 

If i reasign a client (Optiplex 3000 ThinOS 2505) to a different group, and move it back to the original group. It won't take the settings. 
Client is connected to WMS, and i can reboot it via WMS.

If i send unregister command, the client receive it, and unregister.
Trying to reset the client to factory settings. It is discovered after reboot, and when i assign it to the correct group, the client prompts to reboot, as normal.
After reboot it "Tries to get full configuration" but nothing happens. 
WMS status is connected
MQTT server is idle

Any ideas? Known issues?