Ok so I have a 5s running iOS 9 beta 2. I have the Twitter app and was using it when I found out that the only way to access the bottom 4 buttons to see your profile, newsfeed, notifications and messages was to long press it. All the other buttons at the top worked fine with a light tap. Could this be a hint at the 6s coming with force touch or is it just a bug in the Twitter app?