Bad Markup in Blog-Application via https

when uncommenting xwiki.url.protocol=https in xwiki.cfg everything works fine, except the Blog-Application.
The layout smashed because of uncorrect markup of the page.

The values of variable $postDoc.uRL differs from
via http:
/xwiki/bin/view/Blog/companymobiles
to
via https:
<span class="wikigeneratedlinkcontent">https://wiki.xxx.com/xwiki/bin/view/Blog/companymobiles</span>

This leads to the following markup:
<a href="<span class="wikigeneratedlinkcontent">https://wiki.xxx.com/xwiki/bin/view/Blog/companymobiles</span>" .... >....</a>

Certainly the relative link in the first one is also correct when serving over https and that is what i expected.