A possible reason why this bug is not reported by dozens of others is, that ALL of my personal installations use the root partition for the /boot/ tree, and my root partitions are of type XFS.
On the other hand, even falling to grub rescue prompt, even this downgraded grub can correctly handle the XFS filesystem, except for only a really few cases (2 or 3) of the several dozens of test cases, i.e. below 10%.
A possible reason why this bug is not reported by dozens of others is, that ALL of my personal installations use the root partition for the /boot/ tree, and my root partitions are of type XFS.
On the other hand, even falling to grub rescue prompt, even this downgraded grub can correctly handle the XFS filesystem, except for only a really few cases (2 or 3) of the several dozens of test cases, i.e. below 10%.