Hi Rich,
I had similar problems, in a recent install, and I found that by
default, it was installing on legacy, and no uefi stuff was happening.
The boot order was set to only do uefi, and therefore the machine would
not boot. I now, instead to "rinstall -u", to force to
install over uefi.
We are installing a number of Lenovo nx360m5 nodes -
they're set to network boot they come up - they build ok
but after they reboot the they're told to boot from the
local disk by dhcp they don't. If I manually switch the
node to boot from disk that works fine.
I think this may have been