I am adding simple text element in fabric js using this code,
var t = new fabric.IText("Hello world !", {
    backgroundColor: '#FFFFFF',
    fill: '#000000',
    fontSize: 25,
    top : 50,
    left:50
});
canvas.add(t);
And its working perfect, Now issue when i am adding font in style like this,
<style type="text/css">
    @import url(//fonts.googleapis.com/css?family=Playfair+Display);
</style>
Then adding textbox into canvas using fabricjs like this,
var t = new fabric.IText("Hello world !", {
    backgroundColor: '#FFFFFF',
    fill: '#000000',
    fontFamily:'Playfair Display',
    fontSize: 25,
    top : 50,
    left:50
});
canvas.add(t);
With font applied,
But when i click on texbox within canvas, you can see textbox has issue like this http://awesomescreenshot.com/0f05taz2f3. but this happens only when you load page first time or force reload page with ctrl+f5.
Here is the fiddle second time it loads perfect.