Workflow join is not properly working if one step fails about orquesta HOT 4 CLOSED

version: 1.0
tasks:
  # [536, 116]
  task1:
    action: core.echo
    next:
      - do:
          - task2
      - do:
          - task3
    input:
      message: start
  # [391, 251]
  task2:
    action: core.local
    next:
      - do:
          - task4
    input:
      cmd: ls
  # [765, 275]
  task3:
    action: core.local
    next:
      - do:
          - task4
        when: <% failed() %>
    input:
      cmd: ls /rubbish
  # [550, 436]
  task4:
    action: core.echo
    join: all
    input:
      message: joined

version: 1.0
tasks:
  # [536, 116]
  task1:
    action: core.echo
    next:
      - do:
          - task2
      - do:
          - task3
    input:
      message: start
  # [391, 251]
  task2:
    action: core.local
    next:
      - do:
          - task4
    input:
      cmd: ls
  # [765, 275]
  task3:
    action: core.local
    next:
      - do:
          - task5
        when: <% failed() %>
    input:
      cmd: ls /rubbish
  # [550, 436]
  task4:
    action: core.echo
    join: all
    input:
      message: joined
  # [773, 371]
  task5:
    action: core.echo
    next:
      - do:
          - task4
    input:
      message: hello

description: Test for GIT BUG

input:
  - ip: "127.0.0.1"
  - mac_address: "0"
  - dns_hostname: "test.testad.net"

vars:
  - mac_vendor: "DEFAULT-VALUE"
  - a_some_info: "unkown"
  - reverse_lookup_result: null
  - forward_lookup_result: null

tasks:
  Reverse_lookup:
    action: core.local
    input:
      cmd: "nslookup <% ctx().ip %>"
    next:
      - when: <% completed() %>
        publish:
          - reverse_lookup_result: <% result().stdout %>
        do:
          - Add_host_info_note

  Forward_lookup:
    action: core.local
    input:
      cmd: "dig <% ctx().dns_hostname %>"
    next:
      - when: <% completed() %>
        publish:
          - forward_lookup_result: <% result().stdout %>
        do:
          - Add_host_info_note

  MAC_vendor_lookup:
    action: core.http
    input:
      url: "https://api.macvendors.com/<% ctx().mac_address %>"
      method: "GET"
    next:
      - when: <% succeeded() %>
        publish:
          - mac_vendor: <% result().body %>
        do:
          - Workaround
      - when: <% failed() %>
        publish:
          - mac_vendor: "-"
        do:
          - Workaround

  Do_something_else:
    action: core.echo message="Test"
    next:
      - when: <% completed() %>
        publish:
          - a_some_info: <% result().stdout %>
        do:
          - Add_more_info

  Workaround:
    action: core.noop
    next:
      - when: <% succeeded() %>
        do:
          - Add_host_info_note
          
  Add_host_info_note:
    join: all
    action: core.echo message="<% ctx().reverse_lookup_result %> <% ctx().forward_lookup_result %> <% ctx().mac_vendor %>


  Add_more_info:
    action: core.echo message=<% ctx().a_some_info %>

{
      "spec_path": "tasks.Add_host_info_note",
      "message": "The join task \"Add_host_info_note\" is unreachable. A join task is determined to be unreachable if there are nested forks from multi-referenced tasks that join on the said task. This is ambiguous to the workflow engine because it does not know at which level should the join occurs.",
      "type": "semantic",
      "schema_path": "properties.tasks.patternProperties.^\\w+$"
    }

MAC_vendor_lookup:
    action: core.http
    input:
      url: "https://api.macvendors.com/<% ctx().mac_address %>"
      method: "GET"
    next:
      - do:
          - Workaround
      - when: <% succeeded() %>
        publish:
          - mac_vendor: <% result().body %>
      - when: <% failed() %>
        publish:
          - mac_vendor: "-"

   next:
      - do:
          - task5
        when: <% completed() %>
        publish:
          - mac_vendor: "{% if succeeded() %} {{ result().stdout }} {% else %} - {% endif %} "

MAC_vendor_lookup:
    action: core.http
    input:
      url: "https://api.macvendors.com/<% ctx().mac_address %>"
      method: "GET"
   next:
      - do:
          - Workaround
        when: <% completed() %>
        publish:
          - mac_vendor: "{% if succeeded() %} {{ result().body }} {% else %} - {% endif %} "