Infinite-scroll closing tags

I’ve used Infinite-scroll on several projects and have to say it’s usually pretty well behaved. But I’ve just installed on latest build of a new site and it’s doing something odd.

Home page loop articles should render in this html, (and do above the fold);

<article>
    <div id="inner">
        <a>
            <div>
                <IMG>
            </div
            <header>
                <div>
                    <h2 class="entry-title">Title</h2>
                    <div>Meta</div>
                </div>
                <div>CTA</div>
            </header>
        </a>
    </div>
</article>

but everything brought in through infinite-scroll renders like;

<article>
    <div id="inner">
        <a>
          <div></div>
          <IMG>
        </a>
    </div>
    <a>
        <header>
            <div>
                <h2 class="entry-title">Title</h2>
                <div>Meta</div>
            </div>
            <div>CTA</div>
        </header>
    </a>
</article>

Note the wrapping div #inner is closing early, as is the div inside that … Any idea what could be happening?

https://ww.wp.xz.cn/plugins/infinite-scroll/