OQGRAPH backing table changes not reflected in OQGRAPH table

CREATE TABLE oq2_backing (

  origid INT UNSIGNED NOT NULL,

  destid INT UNSIGNED NOT NULL,

  weight DOUBLE NOT NULL,

  PRIMARY KEY (origid, destid),

  KEY (destid)

);

INSERT INTO oq2_backing(origid, destid, weight)

 VALUES (1,2,1), (2,3,1), (3,4,3), (4,5,1), (2,6,10), (5,6,2);

CREATE TABLE oq2_graph (

  latch VARCHAR(32) NULL,

  origid BIGINT UNSIGNED NULL,

  destid BIGINT UNSIGNED NULL,

  weight DOUBLE NULL,

  seq BIGINT UNSIGNED NULL,

  linkid BIGINT UNSIGNED NULL,

  KEY (latch, origid, destid) USING HASH,

  KEY (latch, destid, origid) USING HASH

)

ENGINE=OQGRAPH

data_table='oq2_backing' origid='origid' destid='destid' weight='weight';

UPDATE oq2_backing SET weight=4 WHERE origid=2 AND destid=6;

SELECT * FROM oq2_backing;

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

| origid | destid | weight |

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

| 1 | 2 | 1 |

| 2 | 3 | 1 |

| 2 | 6 | 4 |

| 3 | 4 | 3 |

| 4 | 5 | 1 |

| 5 | 6 | 2 |

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

SELECT * FROM oq2_graph;

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

| latch | origid | destid | weight | seq | linkid |

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

| NULL | 1 | 2 | 1 | NULL | NULL |

| NULL | 2 | 3 | 1 | NULL | NULL |

| NULL | 2 | 6 | 10 | NULL | NULL |

| NULL | 3 | 4 | 3 | NULL | NULL |

| NULL | 4 | 5 | 1 | NULL | NULL |

| NULL | 5 | 6 | 2 | NULL | NULL |

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