This does not occur with the version of grub-xen on 18.04
root@nosgoth:/etc/xen/auto# apt show grub-xen
Package: grub-xen
Version: 2.02-2ubuntu8
I was using a self-built version of it mounted in, and that version matched 16.04's version. After updating, I forgot to stop doing that. An upgrade to 18.04 will resolve it, or back-porting 18.04's package.
This does not occur with the version of grub-xen on 18.04
root@nosgoth: /etc/xen/ auto# apt show grub-xen
Package: grub-xen
Version: 2.02-2ubuntu8
I was using a self-built version of it mounted in, and that version matched 16.04's version. After updating, I forgot to stop doing that. An upgrade to 18.04 will resolve it, or back-porting 18.04's package.