setData doesnt apply when i resize window

[joaofsa2000]

so i want to be able to upload an image as a background for the signature, i already got that working good the only thing is that when i resize the window, the canvas restores the data from the strokes but the background image is gone.

i use the setData method to apply the image so that should be applied on resize no?

here is a little example of a test situation
https://jsfiddle.net/bd0fk8tw/1/