Did this occur after power cycling the radio after the firmware update finished or just that the radio did not reboot after the firmware upload finished
With the official firmware loader (which we do not use because it uses a different file format), the radio is not rebooted after the firmware is loaded.
I don't know why the official loader does not reboot the radio when the upload is complete, but possibly you mean the CPS did not manage to reboot the radio after the upload finished, which may indicate a change in the bootloader in the radio