The board is fairly recent B650E Taichi Lite from 2023, BIOS 12/05/2023 but I wonder if the regression in video is not due to this patch...
https://sources.debian.org/src/grub2/2.14-2/debian/patches/efi-Drop-support-for-UGA-Draw-and-Console-Control-protoco.patch -- Eric Valette
