ANY/SOME operator yields multiple rows in correlated queries

WITH tb as (select array(SELECT * FROM (VALUES (TRUE), (NULL)) as x(a)) as a)
SELECT TRUE = ANY (SELECT b
                   FROM UNNEST(a) AS x1(b)) AS test
FROM tb;

+------+
| TEST |
+------+
|      |
| true |
+------+
2 rows selected

+------+
| TEST |
+------+
| true |
+------+
1 row selected

SELECT TRUE = ANY (SELECT * FROM (VALUES (TRUE), (NULL)) as x(a)) AS test;