groupTable order by - Filter

In my loader I have an order by desc
This works as expected.

        <loader id="pickListsDl">
                <![CDATA[select e from shopOrderHeader e
                where e.sqreq > e.sqfin
                and e.releaseDate >= :startDate
                order by desc ]]>

When I add a filter, the order by does not work anymore.

<layout expand="pickListTable" spacing="true">
    <filter id="filter" applyTo="pickListTable" dataLoader="pickListsDl">
        <properties include=".*"/>
    <groupTable id="pickListTable"
                dataContainer="productionPickListsDc" multiselect="false"

How to fix this?