UCM provisioning seems to work much better on firmware 22.214.171.124 but one thing I have noticed is that under the provisioning Config section within the firmware interface the ‘Config upgrade via’ sets to TFTP rather than http / https. This was an issue on earlier GXP21XX firmware also which I had rectified.
Also we have in Zero Config an option to set firmware upgrade to TFTP which doesn’t work and it was left set as http in ‘Firmware Upgrade via’.
It seems the UCM zero config “Firmware Source Upgrade Via” parameter is working incorrectly. Appears to be influencing the config upgrade via instead of the firmware upgrade via which explains why your seeing the config upgrade via changing to TFTP. We’ll check with the UCM team on the issue.