Table breaks PDF/A-1 compat when accessibility requested

When running fop 2.1 with -a -pdfprofile 'PDF/A-1a' then the pdf output of the following file will not validate on various engines (e.g. pdfbox preflight) with an error 1.4 : Trailer Syntax error, /XRef cross reference streams are not allowed

If the fo:table is taken out of the fo then it gives (more) valid output (i.e. not the xref error). It also avoids the xref error when specifying -pdfprofile 'PDF/A-1b' and no -a flag with fop 2.1. Using fop 1.1 with -a -pdfprofile 'PDF/A-1a' will give other issues (that can be fixed e.g. with exiftool) but will NOT produce the XRef Trailer syntax error.

{{<?xml version="1.0"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:h="http://xmlns.dummycompany.com/letters" xmlns:hx="http://xmlns.dummycompany.com/letters/intern" xmlns:l="http://www.w3.org/1999/xhtml" xmlns:xalan="http://xml.apache.org/xalan" xml:lang="de">
<fo:layout-master-set>
<fo:simple-page-master master-name="first" margin-right="20mm" margin-left="10mm" margin-bottom="20mm" margin-top="32mm" page-width="21cm" page-height="29.6984848098cm">
<fo:region-body margin-left="15mm" margin-bottom="20mm"/>
<fo:region-start extent="10mm"/>
</fo:simple-page-master>
<fo:page-sequence-master master-name="psmA">
<fo:repeatable-page-master-alternatives>
<fo:conditional-page-master-reference master-reference="first"/>
</fo:repeatable-page-master-alternatives>
</fo:page-sequence-master>
</fo:layout-master-set>
<fo:page-sequence master-reference="psmA">
<fo:flow flow-name="xsl-region-body">
<fo:block-container border-color="black" border-style="solid" border-width="0pt" padding="0mm">
<fo:block text-align="start" line-height="14pt" font-family="serif" font-size="11pt" space-before="28pt" font-weight="bold">
<fo:inline>Rechnung Nr. 2016-413</fo:inline>
</fo:block>
<fo:block space-before="7pt" line-height="14pt" font-family="serif" font-size="11pt">
<fo:table>
<fo:table-column column-width="9cm"/>
<fo:table-column column-width="1.4cm"/>
<fo:table-column column-width="2.3cm"/>
<fo:table-header>
<fo:table-row>
<fo:table-cell>
<fo:block font-weight="bold">Leistung</fo:block>
</fo:table-cell>
<fo:table-cell>
<fo:block font-weight="bold">Anzahl</fo:block>
</fo:table-cell>
<fo:table-cell>
<fo:block font-weight="bold" text-align="end">Betrag</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-header>
<fo:table-body>
<fo:table-row>
<fo:table-cell margin-top="10pt">
<fo:block>Spaxschrauben 2,5x5mm</fo:block>
</fo:table-cell>
<fo:table-cell>
<fo:block text-align="center">100</fo:block>
</fo:table-cell>
<fo:table-cell>
<fo:block text-align="end">
<fo:inline>33,75 €</fo:inline>
</fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row border-top-width="0.1pt" border-top-style="solid" position="relative" margin-top="10pt">
<fo:table-cell>
<fo:block>Nettosumme</fo:block>
</fo:table-cell>
<fo:table-cell>
<fo:block> </fo:block>
</fo:table-cell>
<fo:table-cell>
<fo:block text-align="end">
<fo:inline>33,75 €</fo:inline>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:block-container>
</fo:flow>
</fo:page-sequence>
</fo:root>}}