Update fails to update data consistently after locking is released

DROP TABLE IF EXISTS mtest;

CREATE TABLE mtest(x INT DEFAULT 0, c0 INT PRIMARY KEY, c1 INT);

INSERT INTO mtest VALUES (0, 1, 1), (0, 2 , 2);

 -- Initial Table: 

View{

    1:[0, 1, 1]

    2:[0, 2, 2]

}

/* s1 */SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;

/* s1 */BEGIN;

/* s2 */SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;

/* s2 */BEGIN;

/* s2 */UPDATE mtest SET c0=37 WHERE c1=2;

/* s1 */UPDATE mtest SET x = x + 10 WHERE True;（block）

/* s2 */COMMIT;

/* s1 */COMMIT;

mysql> SELECT * FROM mtest;

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

| x    | c0 | c1   |

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

|   10 |  1 |    1  |

|   10 | 37 |    2 |

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

DROP TABLE IF EXISTS mtest;

CREATE TABLE mtest(x INT DEFAULT 0, c0 INT PRIMARY KEY, c1 INT);

INSERT INTO mtest VALUES (0, 1, 1), (0, 67, 2);

 -- Initial Table: 

View{

    1:[0, 1, 1]

    2:[0, 67, 2]

}

/* s1 */SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;

/* s1 */BEGIN;

/* s2 */SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;

/* s2 */BEGIN;

/* s2 */UPDATE mtest SET c0=37 WHERE c1=2;

/* s1 */UPDATE mtest SET x = x + 10 WHERE True;（block）

/* s2 */COMMIT;

/* s1 */COMMIT;

mysql> SELECT * FROM mtest;

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

| x    | c0 | c1   |

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

|   10 |  1 |    1 |

|    0 | 37 |    2 |

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