Problems with a layout



The start point:
ionic start -a sample --sass --v2 sample blank

The next point - I used sample from this repo:

ionic info:
Cordova CLI: 6.4.0
Ionic Framework Version: 2.0.0-rc.4
Ionic CLI Version: 2.1.18
Ionic App Lib Version: 2.1.9
Ionic App Scripts Version: 0.0.47
ios-deploy version: 1.9.0
ios-sim version: 5.0.11
OS: macOS Sierra
Node Version: v6.9.1
Xcode version: Xcode 8.2.1 Build version 8C1002

Safari (macOS Sierra):

Problem with header and scrolling (the same situation on Android)

iPhone 7 (iOS 10):

Problem with header, scrolling, lost 20px on the top of app

Guys, what I do wrong? ))