### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When starting the transcription job in response job object is null:

<img width="1154" alt="Screenshot 2023-04-03 at 09 21 09" src="https://user-images.githubusercontent.com/454412/229447066-1671f811-da49-478d-bf24-252f30b17699.png">


### Expected Behavior

Response from the real AWS stack - job object is not null

<img width="1161" alt="Screenshot 2023-04-03 at 09 30 13" src="https://user-images.githubusercontent.com/454412/229441498-06125248-3b68-4679-8204-0163e8245db6.png">


### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

Using test containers, reproducing project can be found here:

https://github.com/kkocel/local-stack-transcribe-repro

### Environment

```markdown
- OS: macOS
- LocalStack: latest
```


### Anything else?

_No response_
certificate_arns = []
    def factory(**kwargs) -> str:
        if "DomainName" not in kwargs:
            kwargs["DomainName"] = f"test-domain-{short_uid()}.localhost.localstack.cloud"
        region_name = kwargs.pop("region_name", None)
        acm_client = aws_client_factory(region_name=region_name).acm
        response = acm_client.request_certificate(**kwargs)
        created_certificate_arn = response["CertificateArn"]
        certificate_arns.append((created_certificate_arn, region_name))
        return created_certificate_arn
    yield factory
    
    for certificate_arn, region_name in certificate_arns:
        try:
            acm_client = aws_client_factory(region_name=region_name).acm
            acm_client.delete_certificate(CertificateArn=certificate_arn)
        except Exception as e:
            LOG.debug("error cleaning up certificate %s: %s", certificate_arn, e)
@pytest.fixture
def tmp_http_server():