Canvas goes empty after zooming (happens with certain images)

[jloracudris]

Hey Guys

Really nice work with this lib, this issue was reported on march but it didnt get visibility (#167)

I am readdresing this bug, so maybe one of you guys can see it..

So the bug is introduced when you are using initial-image prop, when you remove that prop it doesnt go white when zooming

Here a pen for reproducing it

https://codepen.io/jloracudris/pen/aeRvWM

Steps to reproduce:

1. Save this image to your computer: https://ui-ex.com/images/mini-clip-avatar-1.png
   Open the pen, it will show you an initial image, try to upload the picture you downloaded in step 1
2. when the new picture its uploaded try to zoom
3. See the gray square in the canvas!

repeat all of the above but remove the initial image and it will work