https://drive.google.com/file/d/1o2vVkMRurpZpaJ9OAf1f1pCPWTiqHj3M/view?usp=sharing
You can try flashing this bios with USB BIOS flashback and seeing if it makes a difference, but it's interesting that it worked on the hero.
If that one doesn't work, I posted another one I did in a slightly different way on discord bios mods channel