Inconsistent behavior of virtual column depending on system function

MariaDB [test]> CREATE TABLE t1 (d DATE, v TINYINT(1) AS (d >= CURDATE()));

Query OK, 0 rows affected (0.21 sec)

MariaDB [test]> INSERT INTO t1 (d) VALUES (CURDATE());

Query OK, 1 row affected (0.04 sec)

MariaDB [test]> SELECT * FROM t1;

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

| d          | v    |

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

| 2017-10-11 |    1 |

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

1 row in set (0.00 sec)

MariaDB [test]> SELECT d, v FROM t1;

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

| d          | v    |

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

| 2017-10-11 |    1 |

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

1 row in set (0.00 sec)

MariaDB [test]> SET timestamp = @@timestamp + 3600*24;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> SELECT * FROM t1;

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

| d          | v    |

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

| 2017-10-11 |    1 |

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

1 row in set (0.00 sec)

MariaDB [test]> SELECT d, v FROM t1;

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

| d          | v    |

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

| 2017-10-11 |    0 |

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

1 row in set (0.00 sec)

CREATE TABLE t1 (d DATE, v TINYINT(1) AS (d >= CURDATE()));

INSERT INTO t1 (d) VALUES (CURDATE());

SELECT * FROM t1;

SELECT d, v FROM t1;

SET timestamp = @@timestamp + 3600*24;

SELECT * FROM t1;

SELECT d, v FROM t1;

DROP TABLE t1;