Product valid jpg upload says Image: File extension doesn't match the format of the file

[tkgc]

I'm just trying to add media to my product using this URL: https://greenchoice.gumlet.io/sm-gc/00028000823177.jpg but Shopify refuses to use and gives that error.  Looking at the file metadata:

$ identify -verbose 00028000823177.jpg 
Image:
  Filename: 00028000823177.jpg
  Format: JPEG (Joint Photographic Experts Group JFIF format)
  Mime type: image/jpeg
  Class: DirectClass
  Geometry: 600x600+0+0

[tkgc]

I'm updating several thousand products and 1/3 of them have this issue.  It is an official JPEG -- why doesn't Shopify let me use it?