This is confirmed as broken in the upstream bug I attached. "Booting from 4Kn drives is and will NEVER be supported by BIOS (AKA legacy BIOS AKA LEGACY). The ONLY solution for 4Kn AF drives is to boot via UEFI."
This is confirmed as broken in the upstream bug I attached. "Booting from 4Kn drives is and will NEVER be supported by BIOS (AKA legacy BIOS AKA LEGACY). The ONLY solution for 4Kn AF drives is to boot via UEFI."