Title attribute doesn't update on changes made to the datetime attribute

Check this Plunkr: http://plnkr.co/edit/xEB6WxUpfxgv41Aai4np?p=preview

When I update the date the text changes but the title doesn't.

I saw that it is because the title attribute take precedence, but I'm not sure it's a good case when the user didn't add a title.
