tasks listed after pause do not run when workflow is resumed

When "pause" is in an on-success list, followed by other tasks, it's expected that the following tasks will run after the workflow is resumed. They do not appear to be triggered.

Mistral Workflow Service, version 4.0.1

Example workflow:
--------------------------------------
version: 2.0
workflow:
  tasks:
    task1:
      action: std.echo output="task1"
      on-success:
        - task2
        - pause
        - task3
    task2:
      action: std.echo output="task2"
    task3:
      action: std.echo output="task3"
--------------------------------------

Reproduction steps:

➜ ~ mistral workflow-create -f yaml test_pause.yaml
- Created at: '2017-08-30 17:06:14'
  ID: 9d4954c3-6cca-497c-8357-c60234df1a29
  Input: ''
  Name: workflow
  Project ID: <default-project>
  Tags: <none>
  Updated at: null
➜ ~ mistral execution-create workflow
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| ID | 33f43510-a188-4c42-ab11-f02f0089dfa6 |
| Workflow ID | 9d4954c3-6cca-497c-8357-c60234df1a29 |
| Workflow name | workflow |
| Description | |
| Task Execution ID | <none> |
| State | RUNNING |
| State info | None |
| Created at | 2017-08-30 17:06:25 |
| Updated at | 2017-08-30 17:06:25 |
+-------------------+--------------------------------------+
➜ ~ mistral task-list 33f43510-a188-4c42-ab11-f02f0089dfa6
+------------------------+-------+---------------+------------------------+---------+------------+---------------------+---------------------+
| ID | Name | Workflow name | Execution ID | State | State info | Created at | Updated at |
+------------------------+-------+---------------+------------------------+---------+------------+---------------------+---------------------+
| 39008327-2a9d-42ad- | task2 | workflow | 33f43510-a188-4c42-ab1 | SUCCESS | None | 2017-08-30 17:06:25 | 2017-08-30 17:06:25 |
| 8dbc-8c1dbd07ce5d | | | 1-f02f0089dfa6 | | | | |
| adb9f776-135f-451a- | task1 | workflow | 33f43510-a188-4c42-ab1 | SUCCESS | None | 2017-08-30 17:06:25 | 2017-08-30 17:06:25 |
| b05e-554a40134249 | | | 1-f02f0089dfa6 | | | | |
+------------------------+-------+---------------+------------------------+---------+------------+---------------------+---------------------+
➜ ~ mistral execution-get 33f43510-a188-4c42-ab11-f02f0089dfa6
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| ID | 33f43510-a188-4c42-ab11-f02f0089dfa6 |
| Workflow ID | 9d4954c3-6cca-497c-8357-c60234df1a29 |
| Workflow name | workflow |
| Description | |
| Task Execution ID | <none> |
| State | PAUSED |
| State info | None |
| Created at | 2017-08-30 17:06:25 |
| Updated at | 2017-08-30 17:06:25 |
+-------------------+--------------------------------------+

➜ ~ mistral execution-update -s RUNNING 33f43510-a188-4c42-ab11-f02f0089dfa6
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| ID | 33f43510-a188-4c42-ab11-f02f0089dfa6 |
| Workflow ID | 9d4954c3-6cca-497c-8357-c60234df1a29 |
| Workflow name | workflow |
| Description | |
| Task Execution ID | <none> |
| State | SUCCESS |
| State info | None |
| Created at | 2017-08-30 17:06:25 |
| Updated at | 2017-08-30 17:08:06 |
+-------------------+--------------------------------------+
➜ ~ mistral task-list 33f43510-a188-4c42-ab11-f02f0089dfa6
+------------------------+-------+---------------+------------------------+---------+------------+---------------------+---------------------+
| ID | Name | Workflow name | Execution ID | State | State info | Created at | Updated at |
+------------------------+-------+---------------+------------------------+---------+------------+---------------------+---------------------+
| 39008327-2a9d-42ad- | task2 | workflow | 33f43510-a188-4c42-ab1 | SUCCESS | None | 2017-08-30 17:06:25 | 2017-08-30 17:08:06 |
| 8dbc-8c1dbd07ce5d | | | 1-f02f0089dfa6 | | | | |
| adb9f776-135f-451a- | task1 | workflow | 33f43510-a188-4c42-ab1 | SUCCESS | None | 2017-08-30 17:06:25 | 2017-08-30 17:06:25 |
| b05e-554a40134249 | | | 1-f02f0089dfa6 | | | | |
+------------------------+-------+---------------+------------------------+---------+------------+---------------------+---------------------+
➜ ~ mistral execution-get 33f43510-a188-4c42-ab11-f02f0089dfa6
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| ID | 33f43510-a188-4c42-ab11-f02f0089dfa6 |
| Workflow ID | 9d4954c3-6cca-497c-8357-c60234df1a29 |
| Workflow name | workflow |
| Description | |
| Task Execution ID | <none> |
| State | SUCCESS |
| State info | None |
| Created at | 2017-08-30 17:06:25 |
| Updated at | 2017-08-30 17:08:06 |
+-------------------+--------------------------------------+