Composite atomic-array indexes not ingesting data on creation

SET               `compiler.arrayindex` "true";

DROP DATAVERSE    TestDataverse IF EXISTS;

CREATE DATAVERSE  TestDataverse;

USE               TestDataverse;

CREATE TYPE       GenericType AS { _id: bigint  };

CREATE DATASET    TestDataset (GenericType)

PRIMARY KEY       _id;

INSERT INTO       TestDataset [

    { "_id": 100, "f": 1, "a": {"b": [{"c": {"d": 1}}]} },

    { "_id": 101, "f": "a", "a": null },

    { "_id": 102, "f": "a", "a": {"b": null} },

    { "_id": 103, "f": "a", "a": {"b": [{"c": null}]} },

    { "_id": 104, "f": "a", "a": {"b": [{"c": {"d": null}}]} }

    ];

CREATE INDEX      TestIdx

ON                TestDataset (

    f : bigint,

    UNNEST a.b

    SELECT c.d : bigint

);

FROM TestDataset D

UNNEST D.a.b AB

WHERE D.f = 1 AND AB.c.d = 1

SELECT D._id;