Problem with emoticon after migration from confluence

After migrating content from Confluence to XWiki, I’ve noticed that the content containing Confluence emoticons is missing in XWiki. For example, a table in Confluence appeared like this:
image
but after migration to xwiki all emoticon icons is lost
image
In Source I dont see anything about these emoticons

Would be great if you could create an issue about that on Loading... and especially provide a package with which it’s possible to reproduce the problem you describe.