Image resizing changes are not saved

When inserting an image via drag/drop, the image is uploaded successfully but any resizing actions taken by dragging the image box are not saved when exiting edit mode.

The image looks to be resized when you are still in edit mode, at least until you click 'Save' and then the image defaults to the original upload size. If we change the image size using the 'Advanced' tab of the image editor and specifying width and height, the size is also not preserved.

This behaviour was experienced using the Chrome browser on a Macbook Pro (13.6.1). 

Thanks!