wrong redirect URL in long-running conversation

when I try to send redirect to URL like "/path/to/my/view.xhtml", browser receives redirect to "/view.jsf"
this happens if long-running conversation is active
it seems the problem in following code
public FacesUrlTransformer toRedirectViewId()
{
// skipped
int lastSlash = url.lastIndexOf("/");
if (lastSlash > 0)

{ url = url.substring(lastSlash); }

// skipped
}