The submission within the maestro-content-publish-review-form does not work if the Bootstrap theme is being used. I guess this is the case because the boostrap theme comes with rendering functions that render submit components in forms differently.

Here is an example. Using the Bartik theme, the submit buttons look like this:

<input maestro="complete" id="edit-complete-task" name="op" value="Complete Task" class="form-submit" type="submit"><input maestro="update" id="edit-update-task" name="op" value="Update" class="form-submit" type="submit">

With the Bootstrap theme, they look like that:

      <button maestro="complete" id="edit-complete-task" name="op" value="Complete Task" type="button" class="btn btn-default form-submit">Complete Task</button>
      <button maestro="update" id="edit-update-task" name="op" value="Update" type="button" class="btn btn-info form-submit">Update</button>

When clicking on them, nothing happens, not even a request to the server is being triggered.