Influx db java client batch does not write to DB

I am trying to write points to influxDB using their Java client.
Batch is important to me.

If I use the influxDB.enableBatch with influxDB.write(Point) no data is inserted.
If I use the BatchPoints and influxDB.write(batchPoints) - data is inserted successfully.

Both code samples are taken from: https://github.com/influxdata/influxdb-java/tree/influxdb-java-2.7

    InfluxDB influxDB = InfluxDBFactory.connect(influxUrl, influxUser, influxPassword);
    influxDB.setDatabase(dbName);
    influxDB.setRetentionPolicy("autogen");

    // Flush every 2000 Points, at least every 100ms
    influxDB.enableBatch(2000, 100, TimeUnit.MILLISECONDS);
    influxDB.write(Point.measurement("cpu")
            .time(System.currentTimeMillis(), TimeUnit.MILLISECONDS)
            .addField("idle", 90L)
            .addField("user", 9L)
            .addField("system", 1L)
            .build());

    Query query = new Query("SELECT idle FROM cpu", dbName);
    QueryResult result = influxDB.query(query);

Returns nothing.

    BatchPoints batchPoints = BatchPoints.database(dbName).tag("async", "true").build();
    Point point1 = Point
            .measurement("cpu")
            .tag("atag", "test")
            .addField("idle", 90L)
            .addField("usertime", 9L)
            .addField("system", 1L)
            .build();
    batchPoints.point(point1);
    influxDB.write(batchPoints);
    Query query = new Query("SELECT * FROM cpu ", dbName);
    QueryResult result = influxDB.query(query);

This returns data successfully.

As mentioned, I need the first way to function.
How can I achieve that?

versions:
influxdb-1.3.6
influxdb-java:2.7

Thanks

Start with the Java client's enableBatch path and reproduce the first code sample against InfluxDB 1.3.6, then compare its behavior with the working BatchPoints sample. Verify the fix by confirming that a point written through enableBatch is returned by the provided query after the batch flush interval.