NewPage and InsertPages clash

[pgundlach]

Version 4.3.18

<Layout xmlns="urn:speedata.de:2009/publisher/en"
  xmlns:sd="urn:speedata:2009/publisher/functions/en">

  <Pageformat height="4cm" width="12cm" />
  <SetGrid height="12pt" nx="10"/>
  <Pagetype name="empty" test="false()">
    <AtPageShipout>
      <PlaceObject>
          <Textblock>
              <Paragraph>
                  <Value>foo</Value>
              </Paragraph>
          </Textblock>
      </PlaceObject>
    </AtPageShipout>
  </Pagetype>
  <Pagetype name="a" test="true()">
    <Margin left="1cm" right="1cm" top="24pt" bottom="24pt"/>
    <PositioningArea name="text">
      <PositioningFrame height="{sd:number-of-rows() - 2}" width="{sd:number-of-columns() }" column="1" row="1" />
    </PositioningArea>
    <AtPageShipout>
      <PlaceObject column="1" row="{sd:number-of-rows()}" valign="bottom" allocate="no">
        <Table  stretch="max">
          <Tr>
            <Td align="{if (sd:even(sd:current-page())) then 'left' else 'right'}">
              <Paragraph>
                <Value select="sd:current-page()" />
              </Paragraph>
            </Td>
          </Tr>
        </Table>
      </PlaceObject>
    </AtPageShipout>
  </Pagetype>

  <Record element="chapter">
    <PlaceObject>
        <Textblock>
            <Paragraph>
                <Value select="."/>
            </Paragraph>
        </Textblock>
    </PlaceObject>
    <NewPage />
  </Record>

  <Record element="data">
    <NewPage skippagetype="empty" pagetype="empty" openon="right"/>
    <InsertPages name="insert" pages="1"  />
    <ProcessNode select="chapter" />
    <SavePages name="insert">
      <PlaceObject>
          <Textblock>
              <Paragraph>
                  <Value>Inserted page</Value>
              </Paragraph>
          </Textblock>
      </PlaceObject>
    </SavePages>
  </Record>
</Layout>

<data>
    <chapter>some text</chapter>
</data>

give

The inserted page should be on page 3