Originally reported in https://github.com/localstack/localstack/issues/2099, the CreationTime for CF stacks was hardcoded. This was fixed in in LocalStack itself (https://github.com/localstack/localstack/pull/2103), but is now also fixed in moto (https://github.com/spulec/moto/pull/2818).

I don't know what version of moto you're using, and whether it's acceptable to use dev-releases, but if you do: 

moto 1.3.15.dev550 should fix this issue, so the LS fix can be removed if you upgrade :) 
res_type = resource.get('Type', resource.get('ResourceType', ''))
    parts = res_type.split('::')
    if len(parts) == 1:
        return None
    if res_type.endswith('Cognito::UserPool'):
        return 'cognito-idp'
    if parts[-2] == 'Cognito':
        return 'cognito-idp'
    return parts[1].lower()
def get_resource_name(resource):
    res_type = get_resource_type(resource)
    properties = resource.get('Properties') or {}
    name = properties.get('Name')
    if name:
        return name
    
    if res_type == 'S3::Bucket':
        name = s3_listener.normalize_bucket_name(properties.get('BucketName'))
    elif res_type == 'SQS::Queue':
        name = properties.get('QueueName')
    elif res_type == 'Cognito::UserPool':
        name = properties.get('PoolName')
    elif res_type == 'StepFunctions::StateMachine':
        name = properties.get('StateMachineName')
    elif res_type == 'IAM::Role':
        name = properties.get('RoleName')
    else:
        LOG.warning('Unable to extract name for resource type "%s"' % res_type)
    return name
def get_client(resource, func_config):