Export with flash buttons problem

Example shows problem exporting files using flash. Steps to reproduce: 1. Choose Save button and export to CSV. 2. Click elsewhere to hide flash buttons. 3. Change sorting. 4. Choose Save button and export to PDF. Nothing happens on IE11.

by carrantuohill3

HTML

<link rel="stylesheet" href="https://cdn.datatables.net/s/ju-1.11.4/jqc-1.11.3,jszip-2.5.0,pdfmake-0.1.18,dt-1.10.10,b-1.1.0,b-colvis-1.1.0,b-flash-1.1.0,b-html5-1.1.0,b-print-1.1.0/datatables.min.css">
<script src="https://cdn.datatables.net/s/ju-1.11.4/jqc-1.11.3,jszip-2.5.0,pdfmake-0.1.18,dt-1.10.10,b-1.1.0,b-colvis-1.1.0,b-flash-1.1.0,b-html5-1.1.0,b-print-1.1.0/datatables.min.js"></script>
<table id="example" class="display" cellspacing="0" width="100%">
        <thead>
            <tr>
                <th>Name</th>
                <th>Position</th>
                <th>Office</th>
                <th>Age</th>
                <th>Start date</th>
                <th>Salary</th>
            </tr>
        </thead>
        <tfoot>
            <tr>
                <th>Name</th>
                <th>Position</th>
                <th>Office</th>
                <th>Age</th>
                <th>Start date</th>
                <th>Salary</th>
            </tr>
        </tfoot>
        <tbody>
            <tr>
                <td>Tiger Nixon</td>
                <td>System Architect</td>
                <td>Edinburgh</td>
                <td>61</td>
                <td>2011/04/25</td>
                <td>$320,800</td>
            </tr>
            <tr>
                <td>Garrett Winters</td>
                <td>Accountant</td>
                <td>Tokyo</td>
                <td>63</td>
                <td>2011/07/25</td>
                <td>$170,750</td>
            </tr>
            <tr>
                <td>Ashton Cox</td>
                <td>Junior Technical Author</td>
                <td>San Francisco</td>
                <td>66</td>
                <td>2009/01/12</td>
                <td>$86,000</td>
            </tr>
            <tr>
                <td>Cedric Kelly</td>
                <td>Senior Javascript Developer</td>
                <td>Edinburgh</td>
                <td>22</td>
                <td>2012/03/29</td>
                <td>$433,060</td>
          ...

CSS

.clear {
    clear: both;
}
.datatable-buttons {
    float: right;
    padding-bottom: 10px;
}

JavaScript

$(document).ready(function() {
    $('#example').DataTable({
        "autoWidth": true,
        "scrollX": true,
        "scrollCollapse": true,
        "pagingType": "full_numbers",
        "dom": '<"datatable-buttons"B><"clear">'
            + '<"fg-toolbar ui-toolbar ui-widget-header ui-helper-clearfix ui-corner-tl ui-corner-tr"lfr>'
            + 't<"fg-toolbar ui-toolbar ui-widget-header ui-helper-clearfix ui-corner-bl ui-corner-br"ip>',
        "buttons":[
                        {
                            extend: 'copyFlash',
                            text: 'To clipboard'
                        },
                        {
                            extend: 'print',
                            text: 'Print'
                        },
                        {
                            extend: 'collection',
                            text: 'Save',
                            buttons: ['csvFlash', 'excelFlash', 'pdfFlash']
                        }
                    ]
    });
});