Odd, it works for me under 3.4.1 so it might have to do with the way WordPress is setup on your server.
One way to tell is to see if WordPress itself extracting any of the basic EXIF meta data (exposure, etc) from the image file. If it is then the plugin could have a bug somewhere. But if it isn’t then it might be due to WordPress not having permission to read/access to images files once they are uploaded. Check the permissions on your wp-content/uploads directories.
You can tell if WordPress is extracting EXIF by looking in your database for the post-meta table or by attempting to display the EXIF through adding some PHP code to your image page template. See this article for how to do that: https://www.bloggingtips.com/2008/07/20/wordpress-gallery-and-exif/
Let me know what you find out.
