Machine does not wake up after reboot

[kke]

Create a host

$ footloose version
0.6.3
$ docker version
Client: Docker Engine - Community
 Version:           19.03.8
 API version:       1.40
 Go version:        go1.12.17
 Git commit:        afacb8b
 Built:             Wed Mar 11 01:21:11 2020
 OS/Arch:           darwin/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.8
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.12.17
  Git commit:       afacb8b
  Built:            Wed Mar 11 01:29:16 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          v1.2.13
  GitCommit:        7ad184331fa3e55e52b890ea95e65ba581ae3429
 runc:
  Version:          1.0.0-rc10
  GitCommit:        dc9208a3303feef5b3839f4323d9beb36df0a9dd
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

cluster:
  name: test
  privateKey: ~/.ssh/id_rsa
machines:
- count: 1
  backend: docker
  spec:
    image: quay.io/footloose/ubuntu18.04
    name: worker%d
    portMappings:
    - containerPort: 22
      hostPort: 9022

$ footloose create
INFO[0000] Docker Image: quay.io/footloose/ubuntu18.04 present locally
INFO[0000] Creating machine: test-worker0 ...

$ docker inspect 45562ddb20df
...
...
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
...
...

Reboot

$ footloose ssh root@worker0 systemctl start reboot.target
Connection to localhost closed by remote host.
FATA[0000] exit status 255

$ docker logs 45562ddb20df
...
...
[  OK  ] Reached target Unmount All Filesystems.
[  OK  ] Stopped target Local File Systems (Pre).
[  OK  ] Reached target Shutdown.
[  OK  ] Reached target Final Step.
         Starting Reboot...

Machine never comes up

$ footloose ssh root@worker0
FATA[0000] hostport: failed to inspect container: [ Template parsing error: template: :1:4: executing "" at <index (index .NetworkSettings.Ports "22/tcp") 0>: error calling index: index of untyped nil]: exit status 1

$ docker inspect 45562ddb20df
...
...
        "State": {
            "Status": "exited",
            "Running": false,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 0,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2020-10-20T08:06:57.8096988Z",
            "FinishedAt": "2020-10-20T08:09:23.7651383Z"
        },
...
...