This is very likely not a LXD bug. I suspect this is https://github.com/zfsonlinux/zfs/issues/5796 again which I reported to ZFS upstream. I'll ping them about this again tomorrow and if I don't hear back will take a look at this myself.
** Bug watch added: Github Issue Tracker for ZFS #5796 https://github.com/zfsonlinux/zfs/issues/5796 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1686036 Title: strange behavior after restore snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1686036/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs