row_start not set properly when updating field without system versioning using on duplicate key update

MariaDB [test]> create table test_table (id int unsigned not null primary key, n int unsigned not null without system versioning) with system versioning;

Query OK, 0 rows affected (0,027 sec)

MariaDB [test]> insert into test_table (id, n) values (1, 1) on duplicate key update n=2;

Query OK, 1 row affected (0,007 sec)

MariaDB [test]> insert into test_table (id, n) values (1, 1) on duplicate key update n=2;

Query OK, 3 rows affected (0,005 sec)

MariaDB [test]> select *, row_start, row_end from test_table for system_time all;

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

| id | n | row_start                  | row_end                    |

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

|  1 | 1 | 2023-02-21 12:17:21.303652 | 2023-02-21 12:17:23.935926 |

|  1 | 2 | 2023-02-21 12:17:21.303652 | 2038-01-19 04:14:07.999999 |

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

2 rows in set (0,000 sec)