Select query inside transactions are routed to slave with session_track_trx_state=true

MariaDB [db]> start transaction;

Query OK, 0 rows affected (0.000 sec)

MariaDB [db]> insert into audit set event = 'BLAAAP', details = 'This is a test', created = 0;

Query OK, 1 row affected (0.001 sec)

MariaDB [db]> select * from audit where event = 'BLAAAP';

Empty set (0.001 sec)

MariaDB [db]> select * from audit where event = 'BLAAAP' for update;

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

| id      | user_id | event  | details        | ip_address | created |

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

| 2051146 |    NULL | BLAAAP | This is a test | NULL       |       0 |

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

1 row in set (0.001 sec)