Responsible ID not part of response for active stage of workflow campaign

[spKavvadias]

We would like to get the responsible of a job at a certain active stage. However that doesn't seem to be possible, as by using the SDK function to get the job information:

job_info = workflow_client.job_info(
    job_id=id
)
pp.pprint(job_info)

We get back a response that looks like this:

{
....,
    "job_previous_stage": null,
    "job_active_stage": {
        "id": "841ed69a-3b14-4c06-ab87-7d97a082700a",
        "status": "Active",
        "position": 1.0
    },
    "job_next_stage": {
        "id": "9442b38f-7f47-48ce-a04b-037a6b29c99a",
        "status": "Idle",
        "position": 2.0,
        "responsibleID": null,
        "responsibleGroupID": null
    },
    "job_stages": [
        {
            "id": "841ed69a-3b14-4c06-ab87-7d97a082700a",
            "status": "Active",
            "position": 1.0
        },
        {
            "id": "9442b38f-7f47-48ce-a04b-037a6b29c99a",
            "status": "Idle",
            "position": 2.0
        },
        {
            "id": "1a57e079-770f-41e1-8686-763526a0174e",
            "status": "Idle",
            "position": 3.0
        }
    ]
....

As you can see it is only possible to get the ID of the responsible for the next stage. Is there a way to get the ID of the responsible of the current stage? So far we haven't found another way.