This problem is not fixed. I just purchased a 75 and tried loading the app on my iPad Air. Didn't work. Then I searched the internet and found this thread. Tried my wife's iPad 2, my iPhone 5s, my wife's iPhone 5. Didn't work on any of them. Crashed on opening or within 15 seconds. Finally took out an older iPhone that only has iOS 7 (no update past 7.0) and it worked.
Line 6 needs to fix this because I have a thousand dollar iPad Air that I can't use for this and have to use an old phone and look at a tiny screen. I have spent thousands of dollars on Line 6 products and expect more than this from them....