Filter on derived-table column containing window function inside CASE/comparison is ignored or wrong

CREATE TABLE wf_t (g INT, h INT, v INT) ENGINE=Columnstore;

INSERT INTO wf_t VALUES (1,10,5),(1,11,3),(1,12,1),(2,10,2),(2,13,9),(3,14,4),(3,11,7);

SELECT g, h FROM (

  SELECT g, h, CASE WHEN ROW_NUMBER() OVER (PARTITION BY g ORDER BY v DESC) = 1 THEN 1 ELSE 0 END f

  FROM wf_t) x

WHERE f = 1;

+------+------+

| g    | h    |

+------+------+

|    1 |   10 |

|    2 |   13 |

|    3 |   11 |

+------+------+

+------+------+

| g    | h    |

+------+------+

|    1 |   10 |

|    1 |   11 |

|    1 |   12 |

|    2 |   13 |

|    2 |   10 |

|    3 |   11 |

|    3 |   14 |

+------+------+

SELECT g, h FROM (

  SELECT g, h, ROW_NUMBER() OVER (PARTITION BY g ORDER BY v DESC) rn

  FROM wf_t

) x WHERE rn = 1;