'Should exif:thumbnail:Orientation affect primary image direction when Orientation is Undefined?

origin.jpeg The exif orientation tag is showed below

(base) ➜  /tmp identify -verbose ./origin.jpeg|grep Orientation
  Orientation: Undefined
    exif:thumbnail:Orientation: 6

This image show different in chrome and safari.Safari uses thumbnail:Orientation to rotate image.However, chrome does nothing.Which one is standard?

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Solution	Source