@jubin3 As this is totally unrelated to XOA and XCP-ng, you'll (hopefully) get a better response in the cloud-init community, as it's their project which has (once again) been broken by an OS update. I gave up chasing them some time ago, especially with brand new OS releases.

I second @olivierlambert saying that you should consider EPYC, they are fantastic to work with, have moved my entire org to almost 100% EPYC systems and they have been nothing but rock solid reliable, fast, and efficient. You get more power for the money too and more expansion options. And both Intel and AMD run just fine, there aren't really any issues or differences that matter for most workloads. EPYC is mature at this point though, the "teething" issues from years ago are long gone, I have some first gen EPYC stuff running, some that have had uptime in the realm of a year without a single hiccup.

Indeed, if your other hosts are somehow dead/unresponsive from XAPI perspective, ejecting them from the pool is an option to get your master booting those VMs

Check the Settings/logs view for more details.