I think it was devs duty to make sure kaw app works fine on iOS 9. You previously said previous builds were beta so you don't wanna make changes. Well it's gold master now and still kaw app is squeezed in center. Fix it before there is a general release and everyone starts to complain.
While iOS 9 doesn't launch until September 16th we actually submitted a fix for this to Apple last week. With many apps are submitting updates for iOS 9 it's taking longer than usual for approvals, but it should hopefully be out by the iOS 9 launch.