ALTER .. ENGINE on temporary sequence may go wrong

MariaDB [test]> create temporary sequence s;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> alter table s engine myisam;

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

MariaDB [test]> select nextval(s);

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

| nextval(s)      |

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

| 140241957546134 |

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

1 row in set (0.00 sec)

MariaDB [test]> \r

Connection id:    16

Current database: test

MariaDB [test]> create temporary sequence s;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> alter table s engine innodb;

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

MariaDB [test]> select nextval(s);

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

| nextval(s) |

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

|          0 |

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

1 row in set (0.00 sec)

MariaDB [test]> select nextval(s);

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

| nextval(s)      |

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

| 140241957547216 |

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

1 row in set (0.00 sec)