Image lost after update the image type structure web content

Steps to reproduce:
1. Add the following structure and template.
Structure:
<?xml version="1.0"?>

<root>
<dynamic-element name="Banner" type="image" index-type="" repeatable="false"/>
</root>
Template:
<img src="$Banner.getData()" ></img>
2. Add a web content with this structure without checking the localized check-box.
3. Updated the web content with checking the localized check-box and save.
4. When you add this web content to the page you will find the image lost in the article. However, data exists in the database.