@anothersysadmin The stuck at “iPXE initializing…” is iPXE saying that its having a problem configuring the hardware. I can see this happening on really new hardware.

I would start out with ensuing the firmware is up to date on the target computer. See if rebuilding/compiling iPXE with the latest release solves the issue. https://forums.fogproject.org/topic/15826/updating-compiling-the-latest-version-of-ipxe

Understand this is a problem between iPXE, uefi firmware, and the hardware. FWIW: iPXE is created by another opensource project.