Changing name in URL doesn't affect URL in navigation

Hi,

When I change the name in URL in edit mode and publish the page the URL is changed and I can view the page if I choose View on website. However, when I try to reach the page through the navigation of the site I'm directed to the old URL. 

The navigation gets the URL to the page with:
url = _urlResolver.GetUrl(contentReference, null, new VirtualPathArguments() { ContextMode = ContextMode.Default }); 

If I debug I can see that the URL fetched here is the old one. Does anyone know why I'm not getting the new URL here? 
Also, if I restart the website, the URL is updated with the new one.

Thanks