jQuery Mobile page transfer bug - there is a ">" while new page are loading, after page loading finished it will disappear

jQuery Mobile page transfer bug - there is a ">" while new page are loading, after page loading finished it will disappear

As title, I have two pages in different .html file, the first page with a form, while click on "submit" button, submit the form to server side, then server response the second page.

But I find a bug(possible) while the page transferring, that's there is a ">" on the up-left corner while the browser is in loading the second page. I don't know why, anyone can help me??? thanks!!! 

-- page 1 --

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Advice</title>
    <link href="~/CSS/jquery.mobile-1.4.5.min.css" rel="stylesheet" />
    <script src="~/Scripts/jquery-1.11.2.min.js"></script>
    <script src="~/Scripts/jquery.mobile-1.4.5.min.js"></script>
</head>
<body>
    <div data-role="page" data-dom-cache="false">
        <div data-role="header" data-position="fixed">
            <h1>意见反馈</h1>
        </div><!-- /header -->

        <div role="main" class="ui-content">
            <div style="margin-top:8%"></div>
            <!-- form goes here -->
            <form action="/1.0/common/postadvice" method="post">
                <label for="textarea-content">意见:</label>
                <textarea name="textarea-content" id="textarea-content" placeholder="意见或建议" rows="8"></textarea>
                <br />
                <label for="text-contact">联系方式:</label>
                <input name="text-contact" id="text-contact" type="text" placeholder="联系方式(可空)" value="" data-clear-btn="true">
                <br />
                <button class="ui-btn ui-corner-all ui-btn-b" type="submit">提交</button>
            </form>
        </div><!-- /content -->

        <div data-role="footer" data-position="fixed">
            <h4></h4>
        </div><!-- /footer -->
    </div>><!-- /page -->
</body>
</html>


-- page 2 --

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Post Advice</title>
    <link href="~/CSS/jquery.mobile-1.4.5.min.css" rel="stylesheet" />
    <script src="~/Scripts/jquery-1.11.2.min.js"></script>
    <script src="~/Scripts/jquery.mobile-1.4.5.min.js"></script>
</head>
<body>
    <div data-role="page">
        <div data-role="header" data-position="fixed">
            <h1>意见反馈</h1>
        </div><!-- /header -->

        <div role="main" class="ui-content">
            <div style="margin-top:8%"></div>
            <div>意见反馈已提交,请耐心等待客服处理!</div>
            <a class="ui-btn ui-btn-corner-all" href="/1.0/common/advice">返回</a>
        </div><!-- /content -->

        <div data-role="footer" data-position="fixed">
            <h4></h4>
        </div><!-- /footer -->
    </div>><!-- /page -->
</body>
</html>