Comment 9 for bug 1872077

Why are you passing a device? grub does not care about that, it installs to /boot/efi.

I still don't understand what's going on here?

- Was your /boot/efi mounted when you upgraded grub?
- Did you get a prompt for install locations?

Did you just do a clean install and reboot, and upgrade during first boot - manual or unattended?