Comment 1 for bug 1634390

I managed to reproduce the issue in a fresh MAAS setup.
Deployed two different machines, one with just / and one with split partition / and /var

# Works OK
ubuntu@maas-node06:~$ sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL
NAME FSTYPE SIZE MOUNTPOINT LABEL
vda 20G
└─vda1 LVM2_member 20G
  └─vgroot-root ext4 9.3G /
vdb 10G

# Does not work
ubuntu@maas-node07:~$ sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL
NAME FSTYPE SIZE MOUNTPOINT LABEL
vda 20G
└─vda1 LVM2_member 20G
  ├─vgroot-root ext4 9.3G /
  └─vgroot-var ext4 4.7G /var
vdb 10G