Element title encountered in qandaentry

Hello,

I have a title element as first child in a qandaentry element, this
should be allowed
(https://tdg.docbook.org/tdg/5.0/qandaentry.html) but saxon gives me the
following output:

        [xslt] Element title in namespace 'http://docbook.org/ns/docbook'
	encountered in qandaentry, but no template matches.

and the resulting *.html looks wrong. I'm using this stylesheet:

        docbook-xsl-1.79.2\html\docbook.xsl

I also get this warning

        [xslt] <absolute path>\docbook-xsl-1.79.2\common\utility.xsl:9:31:
	Warning! Stylesheet module <absolute path>/docbook-xsl-1.79.2/common/utility.xsl
	is included or imported more than once. This is permitted, but may
	lead to errors or unexpected behavior
	
and that's my ant target

        <xslt basedir="${basedir}/bugs" destdir="${basedir}/bugs" extension=".html"
		style="${style}/html/docbook.xsl"
                classpath="${saxon.dir}\saxon9he.jar;${resolver.dir}\resolver.jar">
            <include name="*.xml" />
	    <factory name="net.sf.saxon.TransformerFactoryImpl" />
	</xslt>

I've no clue what could be wrong.