I've been able to reproduce the problem in two systems that boot uefi,
(one beowulf, one chimaera) but only after I installed
grub-efi-amd64-signed. It's not necessary to have secure boot enabled; you
just need the signed package. I've been avoiding that package for over a
year because it has caused this problem in the past. If you don't need
secure boot, just use grub-efi-amd64.
I could not reproduce the problem on a system that boots legacy bios and
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