In the following code, I set metadata to hide a column, but the column is still displayed. If the PIVOT line is commented out, then the column does get hidden. I am testing this on Labkey r41716 with Postgres v9.5. Is this an expected limitation of the PIVOT or has something gone wrong?

thanks!
-Will

<div id="MyDiv"></div>
<script type="text/javascript">
Ext4.onReady(function() {
    var qwp1 = new LABKEY.QueryWebPart({
        renderTo: 'MyDiv',
        schemaName: 'Core',
        sql: `
            SELECT
                myGroup,
                attribute,
                AVG(value) as meanValue
            FROM
                (SELECT
                    'cats' AS myGroup,
                    'tails' AS attribute,
                    1 AS value
                )
            GROUP BY
                myGroup,
                attribute
            PIVOT meanValue BY attribute;
        `,
        metadata: {type: 'xml', value:
            `<tables xmlns="http://labkey.org/data/xml">
                <table tableName="MyQuery" tableDbType="NOT_IN_DB">
                    <columns>
                      <column columnName="myGroup">
                        <columnTitle>A Hidden Column</columnTitle>
                          <isHidden>true</isHidden>
                       </column>
                    </columns>
                </table>
            </tables>
            `
        }
    });
});
</script>