Another probable sanity issue has been discovered.
The commit [1] that impacted provisioning also impacts the ability to do a host-unlock if stx-openstack has been applied.
This is being tracked by Launchpad [2] and review [3]
I am testing the fix now.
Al
[1] https://review.opendev.org/#/c/657383/
[2]
https://bugs.launchpad.net/starlingx/+bug/1832237
[3] https://review.opendev.org/#/c/664263/