JPEG 2000 values are doubled

[bogdan...@gmail.com]

On a simple conversion to UInt16 TIFF, the result pixel values are doubled.

As sample data use any of the Sentinel 2 bands from Amazon S3:
http://sentinel-s2-l1c.s3-website.eu-central-1.amazonaws.com/#tiles/35/T/MN/2016/8/29/0/

using Images
using FileIO

img = load("B01.jp2");
save("B01julia.tif", img);

I think the load function is responsible for this.
Any explanation?