Eloqua Click Tracking with Outlook specific code broken?

We have tried using bulletproof buttons from Litmus https://www.litmus.com/blog/a-guide-to-bulletproof-buttons-in-email-design/ to get them to render correctly in Outlook. Links work but we noticed elqtrackid and elqtrack=true still appended to the URL meaning the redirect isn't happening and tracking will not show a click for that contact. We are using the VML approach like this:

<table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td>
      <div>
        <!--[if mso]>
          <v:roundrect xmlns_v="urn:schemas-microsoft-com:vml" xmlns_w="urn:schemas-microsoft-com:office:word" href="http://litmus.com" style="height:36px;v-text-anchor:middle;width:150px;" arcsize="5%" strokecolor="#EB7035" fillcolor="#EB7035">
            <w:anchorlock/>
            <center style="color:#ffffff;font-family:Helvetica, Arial,sans-serif;font-size:16px;">I am a button &rarr;</center>
          </v:roundrect>
        <![endif]-->
        <a href="