Hi again! I have a pipeline that works when the manager is "independent", but when changing the manager to "dependent" it stops working. Do dependent managers require additional configuration, or conflict with other dependent pipelines? 

I'm trying to figure out why the pipeline doesn't run jobs after swapping out the manager. I don't see any errors in my logs, it seems to just... not do anything after the GitHub POST. For reference, my working `pipelines.yaml` is below. The only change I made to break it is replace `independent` -> `dependent`. I'm trying to test out / play with the dependent manager so I can better understand/configure my gate pipeline :) The gate pipeline works only if the check pipeline is independent.
```
- pipeline:
    name: check
    description: |
      Newly opened pull requests enter this pipeline to receive an
      initial verification
    manager: independent
    trigger:
      github:
        - event: pull_request
          action: comment
          comment: (?i)^\s*recheck\s*$
    start:
      github:
        check: 'in_progress'
    success:
      github:
        check: 'success'
    failure:
      github:
        check: 'failure'

- pipeline:
    name: gate
    description: |
      Pull requests ready to be merged enter this pipeline. If the
      tests all pass, we merge the PR
    manager: dependent
    require:
      github:
        review:
          - type: approved
        open: true
    trigger:
      github:
        - event: pull_request
          action: comment
          comment: (?i)^\s*merge\s*$
        - event: pull_request
          action: label
          label: merge
    start:
      github:
        check: 'in_progress'
        comment: false
    success:
      github:
        check: 'success'
        merge: true
    failure:
      github:
        check: 'failure'
    dequeue:
      github:
        check: cancelled

```