Ngmodel is not working with build android problem

Hey guys
my code is :

        <ion-item class="kayitolinput">
                <ion-icon icon name="phone-portrait"></ion-icon>
            <ion-input type="text"  disabled="false" readonly="false" [(ngModel)]="veri.Telephone" placeholder="Telefon Numarası"
                       class=" input input-md ng-pristine ng-valid ng-touched"></ion-input>
        <ion-item class="kayitolinput">
                <ion-icon icon name="lock"></ion-icon>
            <ion-input type="password" disabled="false" readonly="false"  [(ngModel)]="veri.Password"  placeholder="Şifre"
                       class=" input input-md ng-valid ng-dirty ng-touched"></ion-input>

Browser platform is working. But android platform is not reading. :frowning: Please help me.

@ionic/cli-utils : 1.19.0
ionic (Ionic CLI) : 3.19.0
global packages:

cordova (Cordova CLI) : 8.0.0
local packages:

@ionic/app-scripts : 3.1.6
Cordova Platforms : android 5.1.1
Ionic Framework : ionic-angular 3.9.0

Node : v6.12.2
npm : 3.10.10
OS : macOS High Sierra
Xcode : Xcode 9.2 Build version 9C40b

try to remove & add android platform on terminal.

ionic cordova platform rm android


ionic cordova platform add android