Wrong results with optimize_join_buffer_size=on

MariaDB [test]> SELECT t3.v1

    -> FROM t3 LEFT JOIN t4 LEFT JOIN t2 JOIN t1 

    ->   ON t2.pk = t1.pk ON t4.i1 = t1.i1 ON t3.pk = t4.i1

    -> WHERE t1.v2  BETWEEN 'b' AND 'z'

    ->   OR t1.v2 > 'd' AND t1.v2 < 'z' OR t4.v3 > 'c' AND t4.v3 < 'z';

Empty set (0.00 sec)

MariaDB [test]> set optimizer_switch = "optimize_join_buffer_size=on";

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> SELECT t3.v1

    -> FROM t3 LEFT JOIN t4 LEFT JOIN t2 JOIN t1 

    ->   ON t2.pk = t1.pk ON t4.i1 = t1.i1 ON t3.pk = t4.i1

    -> WHERE t1.v2  BETWEEN 'b' AND 'z'

    ->   OR t1.v2 > 'd' AND t1.v2 < 'z' OR t4.v3 > 'c' AND t4.v3 < 'z';

+-------+

| v1    |

+-------+

| OORGO |

| z     |

+-------+

2 rows in set (0.00 sec)