Just had it again, and as expected Oct 06 14:51:55 localhost pcr-signature.sh[506]: mount: /tmp/tmp.fj9VwUXjn7: special device /dev/disk/by-partuuid/656ba952-d4ff-44c2-8eaf-3f6d5011708f does not exist. Oct 06 14:51:55 localhost pcr-signature.sh[506]: dmesg(1) may have more information after failed mount system call. Oct 06 14:51:55 localhost pcr-signature.sh[500]: pcr-signature: unable to mount ESP Oct 06 14:51:55 localhost systemd-cryptsetup[510]: Couldn't find pcrlock policy for volume.