canvas.toDataURL() not displaying sprites

[dorito]

Hey guys, I'm trying to implement a feature where users can download a picture of the game canvas. The code below seems to be working:

var game = new Phaser.Game(900, 700, Phaser.CANVAS, 'gameDiv');

// buncha code adding images and sprites

var image = game.canvas.toDataURL("image/png").replace("image/png", "image/octet-stream"); 
window.location.href=image;  

However, the downloaded image has a big blank box cropped out (I've attached a screenshot to this post). I was wondering what could be causing this—could it be that a sprite is not rendering onto the canvas? I'm not familiar with how Phaser interacts with DOM elements, so thanks in advance for any advice! 

download

[samme]

Try it without the replacement.