Can confirm that apt purge of grub packages then install again worked, though I suspect debconf-set-selections with:
grub-common grub-efi/install_devices_disks_changed multiselect grub-efi-amd64 grub-efi/install_devices_disks_changed multiselect grub-common grub-efi/install_devices multiselect /dev/vda1 grub-efi-amd64 grub-efi/install_devices multiselect /dev/vda1
might work too
Can confirm that apt purge of grub packages then install again worked, though I suspect debconf- set-selections with:
grub-common grub-efi/ install_ devices_ disks_changed multiselect install_ devices_ disks_changed multiselect install_ devices multiselect /dev/vda1 install_ devices multiselect /dev/vda1
grub-efi-amd64 grub-efi/
grub-common grub-efi/
grub-efi-amd64 grub-efi/
might work too