Hello,
I have noticed this issue when trying edit some HTML in the editor. This is part of the content I am trying to edit; notice the <p> and <span> tags around the <div> tag.
<html>
<body>
<table >
<tr>
<td >
<p align="left"><span style="font-size: 10pt; font-family: Arial">
<div align="center"></div>
<br />
Test String 1
<br />
</span></p>
</td>
</tr>
</table>
</body>
</html>
After I paste this in the editor in the HTML mode; and switch to Normal mode and then back to the HTML mode; I see the text following the <div> tag getting duplicated like this.
<html>
<body>
<table>
<tbody>
<tr>
<td>
<p align="left"><span style="font-size: 10pt; font-family: Arial">
<div align="center"></div>
<br />
Test String 1
<br />
</span></p>
Test String 1 </td>
</tr>
</tbody>
</table>
</body>
</html>
I am able to reproduce it on your demo here.
The issue seems to be because of both the <p> and <span> tags around the <div> tag; if I remove either, the duplicating of the content stops.
Is there a work around for this issue?