Defiantly dji problem. It's not the only app that had issues. Multitasking was giving front end app only 30% of the processing power, even with multi turned off. With that said dji should have been ready for the 9.0 enhancements prior to release. If your going to use another persons software to run your app, you should have been ready for the release. So in short Apple has some issues not affecting all devices, but dji dropped the ball. When I complained they told me you can always go android.... Really. That's like a gmc not running because of a faulty ignition and gm tells you to go buy a ford until they can fix the issue.