Why does Bootstrap popover get squished when target is inside an affixed container?

Question

This jsfiddle says it best, but I have a popover trigger that works fine. If I make the container affixed, however, the popover gets squished. Why and how to I remedy this?

<script type="text/javascript">
$(function () {
    $(".popover-trigger").popover({
        content: function () {
            return $("#popover-content").html();
        }
    });

    $(".btn").click(function(){
        var jq = $(".popover-trigger").parent().toggleClass("affix");
        var state = jq.hasClass("affix") ? "" : "not";
        $(".state").html(state);
    });
});
</script>
<div id="popover-content" class="hide">Lorem ipsum dolor sit amet ... </div>
<div class="container">
    <div class="row">
        <div class="well">
            <div class="popover-trigger" data-trigger="hover" data-toggle="popover" data-original-title="Popover" data-html="true">
                I'm <span class="state">not</span> affixed. 
                <button class="btn">Toggle</button>
            </div>
        </div>
    </div>
</div>

Answer 1

Not sure why, but setting the popover's container option fixed my problem, as shown in this fiddle.

Answer 2

See updated fiddle

I am no expert but defining the size of the popover in your CSS helps ensure that it keeps its shape. That is done by calling popover {height: x; width: y}.