I've been using the contact form without problems in 4.5.2 and 4.7.1.  I have used umbraco.library:RenderMacroContent as I need the macro in the xslt file.

After upgrading to 4.9.1 and also trying 4.10.1, this seems to break.

If I insert the macro directly into a template, it seems fine.  But that doesn't work for my sites.

Any idea why this breaks for the upgraded versions?

       <xsl:variable name="macro">

          <xsl:text>&lt;?UMBRACO_MACRO macroAlias=&quot;ContactForm&quot; MailFrom=&quot;</xsl:text>
          <xsl:value-of select="umbraco.library:GetXmlNodeById($startNode)/mailFrom" />
          <xsl:text>&quot; MailFromName=&quot;</xsl:text>
          <xsl:value-of select="umbraco.library:GetXmlNodeById($startNode)/mailFromName" />
          <xsl:text>&quot; MailSubject=&quot;</xsl:text>
          <xsl:value-of select="umbraco.library:GetXmlNodeById($startNode)/mailSubject" />
          <xsl:text>&quot; MailIntroText=&quot;</xsl:text>
          <xsl:value-of select="umbraco.library:GetXmlNodeById($startNode)/mailIntroText" />
          <xsl:text>&quot; MailSubjectCopyToSender=&quot;</xsl:text>
          <xsl:value-of select="umbraco.library:GetXmlNodeById($startNode)/mailSubjectCopyToSender" />
          <xsl:text>&quot; MailIntroTextCopyToSender=&quot;</xsl:text>
          <xsl:value-of select="umbraco.library:GetXmlNodeById($startNode)/mailIntroTextCopyToSender" />
          <xsl:text>&quot; FormSentConfirmation=&quot;</xsl:text>
          <strong><xsl:value-of select="umbraco.library:GetXmlNodeById($startNode)/formSentConfirmation" /></strong>
          <xsl:text>&quot;&gt;&lt;/?UMBRACO_MACRO&gt;</xsl:text>
        </xsl:variable>
        <xsl:value-of select="umbraco.library:RenderMacroContent($macro, ./@id)" disable-output-escaping="yes" /><br />