MariaDB Transaction insert one data 1 row affected BUT select Empty set

Server version: 10.4.8-MariaDB MariaDB Server
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MariaDB [test]> begin;
Query OK, 0 rows affected (0.000 sec)

MariaDB [test]> insert into t values ("1");
Query OK, 1 row affected (0.001 sec)

MariaDB [test]> select * from t;
Empty set (0.001 sec)