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 :) 
if _type == bool:
            return _obj in ['True', 'true', True]
        if _type == str:
            return str(_obj)
        if _type == int:
            return int(_obj)
        return _obj
    def fix_types(o, **kwargs):
        if isinstance(o, dict):
            for k, v in o.items():
                if k in attr_names:
                    o[k] = cast(v, types[k])
        return o
    result = common.recurse_object(params, fix_types)
    return result
def remove_none_values(params):
    """ Remove None values recursively in the given object. """
    def remove_nones(o, **kwargs):
        if isinstance(o, dict):
            for k, v in dict(o).items():
                if v is None:
                    o.pop(k)
        return o
    result = common.recurse_object(params, remove_nones)
    return result
def deploy_resource(resource_id, resources, stack_name):