Click is absolutely fine. Just moving does not seems to be Cloud you try scrolling on first screen with test selection, try to switch scene few times and scroll again. It will never actually drop frames, but it will start dropping move calls so next move is delayed for a few frames and you can see that. If your eye it's not trained to see 60fps you can simple add logging/profiling to move callback and you will see that after while the delay goes from 1/60s to something more like 1/30 or even less.
I'm not sure what might causes that, but it's happening
My setup is iOS 10.0.1, Cocos2dx 3.13.1, Xcode 8.0 (8A218a), OS X 10.11.6 (15G31) and it's happening on all devices i have