Yes, this happens immediately without any delay. I also have a 6+.Did you try closing the app on the phone and then reopening the app? The phone will shut down the app after a while to save battery life. (It may look like it's open and ready) If it's been open a while I just close and reopen. Too many apps open all at once will interfere with it functioning. I have iPhone 6+. Double click the home button and swipe the apps up to close.