Grub Countdown Issue - doesn't work without keyboard

I have a fresh install of the latest TrueNAS scale, was able to boot into the system no problem after setup. When I reboot the system WITHOUT a keyboard plugged in however, GRUB doesn’t display the usual 10s countdown and I never get past the Grub screen.

I want to avoid having to find a keyboard to plug into the NAS every time I want to reboot. I’m not sure how to troubleshoot this. I don’t think this is a BIOS issue.