That's 'cause you're in lagacy/bios, hence why it works.
But for everything else after post-install, as everyone else has already found out, and mentioned, including VB, uefi/gpt, <- it fails at boot, "TLP Started...", and with no xorg-server,..., pkgs installed. ?!
aka, You need to test this in a "real" UEFI-based system, and/or VB to see what we mean.
But thanks anyway, we've been here before already.