JQuery Mobile固定页眉和页脚栏在滚动时消失

JQuery Mobile固定页眉和页脚栏在滚动时消失，然后在滚动停止时再次出现。我正在用ripple模拟器进行测试

<div id="tv_links" data-position="fixed" data-tap-toggle="false" data-role="footer" data-theme="b">
    <div data-role="navbar">
        <ul>
            <li><a href="#business" data-role="button" data-inline="true" data-icon="info">Business News </a>

                <li><a href="#sportsnews" data-role="button" data-inline="true" data-icon="info">Sports News </a>

                    <li>
<a href="#weather_update" data-role="button" data-inline="true" data-icon="info">Weather </a>

                        <li>
<a href="#interactive" data-role="button" data-inline="true" data-icon="info">Get Live </a>
        </ul>
    </div>
</div>

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