Comment 8 for bug 1865515

FWIW, a partner is also hitting this in the field when trying to do Secure Boot installs which break 100% of the time for them.

They have noted, however, that installing from ISO works and can successfully install and boot on a secure boot enabled server. They've only tested Focal ISOs at this time, but this tells me that there's some difference between what MAAS images are getting or have gotten, and what the ISO has or is doing during install.