Wrong result (extra rows) on LEFT JOIN with a view and IS NULL in WHERE, condition_pushdown_for_derived=on

CREATE TABLE t1 (a INT);

INSERT INTO t1 VALUES (0),(2);

CREATE TABLE t2 (b INT);

INSERT INTO t2 VALUES (1),(2);

CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;

SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;

MariaDB [test]> SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;

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

| a    | b    |

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

|    0 | NULL |

|    2 | NULL |

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

2 rows in set (0.00 sec)

MariaDB [test]> SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;

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

| a    | b    |

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

|    0 | NULL |

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

1 row in set (0.00 sec)