er. An encoder filter that invokes Envoy&rsquo;s route manager APIs that access request&rsquo;s &ldquo;Host&rdquo; header will cause a NULL pointer to be dereferenced and result in abnormal termination of the Envoy process.</p><h2 id=bug-fixes>Bug fixes</h2><ul><li><strong>Fixed</strong> an issue where a duplicate listener was generated for a proxy&rsquo;s IP address when using a headless <code>TCP</code> service. (<a href=https://github.com/istio/istio/issues/17748>Issue 17748</a>)</li><li><strong>Fixed</s