POST /orders/validate times out with invalid body content

curl -X POST \
  'http://folio-testing-backend01.aws.indexdata.com:8000/orders/validate?type=GOBI&apikey=eyJzIjoiNXNlNGdnbXk1TiIsInQiOiJkaWt1IiwidSI6ImRpa3UifQ==' \
  -H 'Content-type: application/json' \
  -H 'cache-control: no-cache' \
  -d '<PurchaseOrder>
  <CustomerDetail>
    <BaseAccount>5095</BaseAccount>
    <SubAccount>509564</SubAccount>
  </CustomerDetail>
  <Order>
    <ListedElectronicSerial>
      <collection>
        <record>
          <leader>00000nas a2200000u  4500</leader>
          <controlfield tag="001">99962603521</controlfield>
          <controlfield tag="003">NhCcYBP</controlfield>
          <controlfield tag="005">20151119104734.0</controlfield>
          <controlfield tag="008">151119nuuuuuuuuxx ||||||||||||||   und d</controlfield>
          <datafield tag="245" ind1="0" ind2="0">
            <subfield code="a">BRANDS AND THEIR COMPANIES. (EBOOK VERSION)</subfield>
          </datafield>
          <datafield tag="260" ind1=" " ind2=" ">
            <subfield code="b">GALE ONLINE</subfield>
          </datafield>
          <datafield tag="490" ind1="0" ind2=" ">
            <subfield code="a">BRANDS AND THEIR COMPANIES. (EBOOK VERSION)</subfield>
          </datafield>
        </record>
      </collection>
      <OrderDetail>
        <ItemPONumber>118290</ItemPONumber>
        <FundCode>HUM</FundCode>
        <OrderNotes>v.2 | Test Note to Ybp</OrderNotes>
        <Quantity>1</Quantity>
        <YBPOrderKey>99962603521</YBPOrderKey>
        <OrderPlaced>2015-10-21T16:00:02</OrderPlaced>
        <Initials>KH</Initials>
        <ListPrice>
          <Amount>0</Amount>
          <Currency>GBP</Currency>
        </ListPrice>
        <PurchaseOption>
          <VendorPOCode>GAL</VendorPOCode>
          <Code>EA</Code>
          <Description>GALE GVRL - Multiple User Access</Description>
          <VendorCode>GALEA</VendorCode>
        </PurchaseOption>
      </OrderDetail>
    </ListedElectronicSerial>
  </Order>
</PurchaseOrder>'