Incorrect URL in email alerts

Hi

I found a problem in SP 2013 related to email alerts

If I have two zone

Default Zone: http://intranet

Extranet Zone: http://extranet

When I created an alert (immediate, all changes) for a library (Documents1) underhttp://extranet I get confirm email with correct links (http://extranet) but when I upload a file in library (Documents1) I get the email with incorrect links (http://intranet)

In SharePoint 2010 SP1 CU Dec 2012 everything is ok, works correclty

Thanks for help

Ovidiu10