index() and repeat with bind

gistfile1.xml

<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
            xmlns:ev="http://www.w3.org/2001/xml-events"
            xmlns:xf="http://www.w3.org/2002/xforms"
            xmlns:xs="http://www.w3.org/2001/XMLSchema"
            xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
            xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
            xmlns:idc="http://www.inventivedesigners.com/xbl"
            xmlns:exf="http://www.exforms.org/exf/1-0"
            xmlns:saxon="http://saxon.sf.net/">
    <xhtml:head>
        <xhtml:meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
        <xhtml:title>Test</xhtml:title>

        <xf:model id="m-default">

            <xf:instance id="i-default">
                <data xmlns="">
                    <repeat>
                        <id>1</id>
                    </repeat>
                </data>
            </xf:instance>

            <xf:instance id="i-counter">
                <form xmlns="">
                    <counter>1</counter>
                </form>
            </xf:instance>

            <!-- bindings -->
            <xf:bind ref="repeat" id="repeat-bind"/>

        </xf:model>

    </xhtml:head>
    <xhtml:body style="width: 80%; margin-left: auto; margin-right: auto;">

        <xhtml:table style="border: 1px solid black; margin-top: 50px;">
            <xhtml:tbody>
                <xf:repeat id="my_repeat" bind="repeat-bind">
                <!--<xf:repeat id="my_repeat" ref="repeat">-->
                    <xhtml:tr>
                        <xhtml:td>
                            <xf:output ref="id"/>
                        </xhtml:td>
                    </xhtml:tr>
                </xf:repeat>
            </xhtml:tbody>
        </xhtml:table>

        <xf:trigger>
            <xf:label>Insert</xf:label>
            <xf:action ev:event="DOMActivate">
                <xf:setvalue ref="instance('i-counter')/counter" value="number(.) + 1"/>
                <xf:insert ref="repeat" at="index('my_repeat')" position="after" />
                <xf:setvalue ref="repeat[last()]/id" value="instance('i-counter')/counter"/>
            </xf:action>
        </xf:trigger>
        <xf:output value="index('my_repeat')"/>

        <fr:xforms-inspector/>
    </xhtml:body>
</xhtml:html>