Internal link (that open a new windows) in a PrettyName property is malformed in edit mode

Hello,

When I create a DocClass, sheet & Template with a property containing this link in PrettyName:

[[label>>MySpace.MyPage||rel="__blank"]]

In view mode the link is working well:

<span class="wikilink">
<a rel="__blank" href="/xwiki/bin/view/MySpace/MyPage" target="_blank">label</a>
</span>

but my form in edit mode HTML code of same link is incomplete:

<span class="wikilink">
<a rel="__blank" href="/xwiki/bin/view/MySpace/MyPage">label</a>
</span>

target="_blank" missing and clicking on this link doesn't opened in a new windows (and all non recorded data of the form is lost of course).

(MySpace.MyPage exist)

Thxs.

Pascal B