Instagram links in Twitterrific 5

When I tap an Instagram link in Twitterrific 5 it opens in a webpage rather than the photo viewer. What's going on?

Because of Instagram's recent changes to the way they provide images, we no longer display Instagram photos in the photo viewer. Instagram links now open in the in-app web browser, where you can see additional information about the image, like the user who posted the image, comments, and likes. There's also a link for opening the image in Instagram's iOS application.