If you haven't yet, make sure to report it through the feedback app and provide them the image you posted here. Even though it's a 3rd party app, it could be an issue in the OS how it handles it. Or it could just very well be an issue of Facebook app not updated to iOS 9 code. Which in the case of that, only waiting until iOS 9 is officially released and Facebook then being allowed to put out an iOS 9 update on the App Store. (Not allowed until official release)
But the above poster says they had it with photos app. So it could be a bug in the OS.