binlog-do-db bypassed by 'create table' DDL

...

binlog-format                  = ROW

binlog-do-db                   = test_db1

binlog-do-db                   = test_db2

...

Server version: 10.0.19-MariaDB-log MariaDB Server

Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> create database test_db1;

Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> create database test_db2;

Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> create database test_db3;

Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> create table test_db1.t(i int);

Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> create table test_db2.t(i int);

Query OK, 0 rows affected (0.01 sec)

MariaDB [(none)]> create table test_db3.t(i int);

Query OK, 0 rows affected (0.01 sec)

MariaDB [(none)]> insert into test_db1.t values (1);

Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> insert into test_db2.t values (1);

Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> insert into test_db3.t values (1);

Query OK, 1 row affected (0.00 sec)

create database test_db1

create database test_db2

create table test_db1.t(i int)

create table test_db2.t(i int)

create table test_db3.t(i int)

### INSERT INTO `test_db1`.`t`

### INSERT INTO `test_db2`.`t`