Zabadabadoo, was correct. As I said I didn't properly read the update this time (normally I do but was in a hurry) but kernel 6.8.0-40-generic was the one I was running with the issue, grub boot menu (AKA advanced options for Zorin) after a few tries with different keys, but it was with rapid tapping on right shift key that got me in.
Rolled back to 6.5.0-45-generic and issues were resolved.
I then followed Aravision's post to make my current kernel version saved and default boot. While I was there I noticed and changed the GRUB_TIMEOUT from 0 to 2, so hopefully I won't have to try so many times to get into it next time I have to do so.
Finally, I would still love to know why 6.8 was doing that, if anybody knows what resources I could go to to learn that would be awesome.