Links in tree macro do not work if using wiki syntax

If using the tree macro like so:

{{tree links='true'}}
* [[Grandparent>>Space.Page]]
** [[Parent>>http://www.xwiki.org]]
{{/tree}}

The tree is created but the links do not work.
href attribute of the nodes are overwritten at some point with "#".

Expected result:
A tree with clickable nodes that direct you to the specified link.

*Note: If using html in the macro content instead, it seems to work fine.