Reverse Google Image Search

I'm trying to reverse image search a url from an android app. The base url I'm using is:

http://ift.tt/2iumpqI

This works for most urls, however certain ones don't working from the app, for example with the url from a reddit post:

http://ift.tt/2ijG0tc

which becomes

http://ift.tt/2iRqEcj

But that says "The URL doesn't refer to an image, or the image not publicly accessible." However if I go to images.google.com and paste http://ift.tt/2ijG0tc manually it works perfectly fine. Any ideas why it would be having an issue with some urls and not others?