Actually, I attempted through both Secure / Non-secure boot via loading the new build 22000.71 as uploaded by you. But system doesn't recognise the boot and move directly inside the pre-installed OS i.e. previous build updated with recent cumulative update of 22000.71. The possible problem is with the technique of creation of recent build you've just uploaded. I've never encountered an issue during the installation of previous version.Meaning does not pick up the final image. Can you explain it with screenshots or describe it in more detail?