bug in RULE insert

Strange the rule works for an insertion

example:

CREATE TABLE public.test
(
id bigserial NOT NULL,
name text
);

ALTER TABLE public.test
ADD CONSTRAINT test_constraint_pkey PRIMARY KEY(id);

CREATE TABLE public.v_test
(
id bigserial NOT NULL,
v_id bigint,
v_name text
);

ALTER TABLE public.v_test
ADD CONSTRAINT v_test_constraint_pkey PRIMARY KEY(id);

CREATE OR REPLACE RULE insert AS
ON INSERT TO test DO INSERT INTO v_test (v_id, v_name)
VALUES (new.id, new.name);

then execute

insert into test(name)
values
('1'),
('2'),
('3')

values in test.id <> v_test.v_id
Tested on postgresql 9.5/9.6 install from PPA   http://apt.postgresql.org/pub/repos/apt
OS ubuntu-sever 14.04/16.04
Bbest regards
Alexander Pokolenko.