GRUB recordfail broken regarding LVM
I just noticed this issue, too. It appears to be related to this change from January 9
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1800722
It looks like a bug has been submitted to fix the issue caused by the original bug fix
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1815002