Why Router.go doesn't works on observe callback

Question

I have a template like this :

Template.playDetails.created = function () {
  /* Catch removed documents and redirect client if happens */
  Games.find({_id: gameId}).observe({
    removed: function () {
        console.log("Ooops game deleted !");
        Alerts("The game was deleted by owner", "danger");
        Router.go("playList"); 
    }
  });
};

And when i delete a game the log is shown on console but neither Alerts or Router.go works.

I tried to call Router.go with a time out but that didn't change anythings

Meteor.setTimeout(function(){ Router.go('playList'); }, 10);

Is there anything i didn't do well ?