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 :) 
return execute_resource_action(resource_id, resources, stack_name, ACTION_CREATE)
def delete_resource(resource_id, resources, stack_name):
    return execute_resource_action(resource_id, resources, stack_name, ACTION_DELETE)
def execute_resource_action(resource_id, resources, stack_name, action_name):
    resource = resources[resource_id]
    resource_type = get_resource_type(resource)
    func_details = RESOURCE_TO_FUNCTION.get(resource_type)
    if not func_details or action_name not in func_details:
        LOG.warning('Action "%s" for resource type %s not yet implemented' % (action_name, resource_type))
        return
    LOG.debug('Running action "%s" for resource type "%s" id "%s"' % (action_name, resource_type, resource_id))
    func_details = func_details[action_name]
    func_details = func_details if isinstance(func_details, list) else [func_details]
    results = []
    for func in func_details:
        if callable(func['function']):
            result = func['function'](resource_id, resources, resource_type, func, stack_name)
            results.append(result)
            continue
        client = get_client(resource, func)
        if client:
            result = configure_resource_via_sdk(resource_id, resources, resource_type, func, stack_name)
            results.append(result)
    return (results or [None])[0]
def configure_resource_via_sdk(resource_id, resources, resource_type, func_details, stack_name):