Bug while scrolling onto navbar

Ionic Framework ionic-v3
#1

Hi guys !

I have a big problem with my Ionic 3 application.
When I scroll onto nav, this is scrolling to. Just check the attached GIF.

I hope someone will help me.

Sorry for my english.

scroll_bug
scroll_bug.gif354×680 1.98 MB 

Ionic:

   ionic (Ionic CLI)  : 4.4.0
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.2.0

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0, ios 4.5.5
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.0.2, (and 10 other plugins)

System:

   Android SDK Tools : 26.1.1 (/Users/meMe/Library/Android/sdk)
   ios-deploy        : 2.0.0
   ios-sim           : 6.1.2
   NodeJS            : v11.0.0 (/usr/local/bin/node)
   npm               : 6.4.1
   OS                : macOS High Sierra
   Xcode             : Xcode 10.0 Build version 10A255
#2