Nomad doesn't work with docker container IPv6

I’ve followed the documentation instructions all of the driver, config, and service stanzas but I do not see any addresses when I create a job with Nomad, the issue on GitHub is marked as resolved via a PR merge but it’s not working for me, please see: https://github.com/hashicorp/nomad/issues/3785

Copied here:

This isn’t working for me, when I view the addresses

$ sudo docker inspect --format '{{ .NetworkSettings.GlobalIPv6Address }}' server-250d454d-46f6-8fc4-26a1-3b4a38527733
2a01:4f8:c2c:bafc::3

Which shows that the container started by nomad has IP address 2a01:4f8:c2c:bafc::3

Yet when I inspect the job allocation it shows empty Addresses

ID                  = 250d454d
Eval ID             = 597d08e7
Name                = ip6-echo.example[0]
Node ID             = 1e1c3ab8
Node Name           = centos-4gb-nbg1-1
Job ID              = ip6-echo
Job Version         = 824636069392
Client Status       = running
Client Description  = Tasks are running
Desired Status      = run
Desired Description = <none>
Created             = 47s ago
Modified            = 36s ago

Task "server" is "running"
Task Resources
CPU        Memory           Disk     Addresses
0/500 MHz  4.3 MiB/256 MiB  300 MiB  

Task Events:
Started At     = 2019-10-01T08:57:49Z
Finished At    = N/A
Total Restarts = 0
Last Restart   = N/A

Recent Events:
Time                       Type        Description
2019-10-01T10:57:49+02:00  Started     Task started by client
2019-10-01T10:57:48+02:00  Driver      Downloading image
2019-10-01T10:57:48+02:00  Task Setup  Building Task Directory
2019-10-01T10:57:48+02:00  Received    Task received by client

Here’s the jobfile for this

job "ip6-echo" {
  datacenters = ["dc1"]

  group "example" {
    task "server" {
      driver = "docker"

      config {
        image = "localhost:5000/express-test"
        advertise_ipv6_address = true
      }

      resources {
        cpu    = 500 # 500 MHz
        memory = 256 # 256MB
        network {
          mbits = 10
        }
      }

      service {
        name = "ip6-echo-service"
        port = 5555
        address_mode = "driver"
      }
    }
  }
}