I upgraded from 6.11.5 to 6.12.0 and immediately noticed that a Windows 11 VM I have no longer works - it sits there with the unraid logo constantly and doesn't seem to boot at all.
I tried recreating the VM from scratch as it's a pretty simple VM and even that failed.
Checked /config/vfio-pci.cfg and its empty, as is /var/log/vfio-pci-errors
Rolled back to 6.11.5 and the VM started working again.
Diagnostics attached.
ubernas-diagnostics-20230616-1331.zip