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Note that this is being tested in a KVM virtual machine with the ovmf-ia32
firmware.

Using grub2-i386-efi version 2.06.2.1 I see:

Kernel 5.13.2-1-default always fails.  The machine resets after attempting to
boot.

Kernel 5.13.1-1-default sometimes fails and sometimes succeeds.

Kernel 5.12.13-1-default boots successfully.

However, if I instead use an older version of grub2-i386-efi (version 2.04-16.1
from last summer), then all three kernels boot successfully.

I have listed the component (for the bug report) as bootloader, because that's
what seems to me to be broken.  But perhaps it should instead be considered a
kernel issue.

Reproducible: Always