Ion-nav-title doesn't work properly when deployment on device,when using run or build

i’m working on application was exported from ionic creator, and i added many features to it.
i have a problem when navigation between tabs using ionic nav bar,views titles on ion-nav-title doesn’t work properly only on device,when using ionic run android or build android.
and what i misunderstood why the titles were working fine on browser using ionic serve.
sample of my code :
this one of views which i navigate to using nav bar

  <ion-view   id="page12">
<ion-nav-title>Services</ion-nav-title>
 <ion-content padding="true" class="has-header">
  <ion-list id="services-list8">
    </ion-item>
  </ion-list>
</ion-content>
this is code from route.js :
.state('tabsController', {
    url: '/page1',
    templateUrl: 'templates/tabsController.html',
    abstract: true
})

.state(‘tabsController.services’, {
url: ‘/page12’,
views: {
‘tab4’: {
templateUrl: ‘templates/services.html’,
controller: ‘servicesCtrl’
}
}
})

and this is the tabs view :

 <ion-view id="page1">
<ion-tabs class="tabs-stable tabs-icon-top" id="tabsController-tabs1">
    <ion-tab title="HOME" icon="ion-home" href="#/page1/page10" id="tabsController-tab1" class="my class 1">
        <ion-nav-view name="tab1"></ion-nav-view>
    </ion-tab>
    <ion-tab title="SERVICECS" icon="ion-grid" href="#/page1/page12" id="tabsController-tab4">
        <ion-nav-view name="tab4"></ion-nav-view>
    </ion-tab>
    <ion-tab title="CLIENTS" icon="ion-ios-people" href="#/page1/page8" id="tabsController-tab5">
        <ion-nav-view name="tab5"></ion-nav-view>
    </ion-tab>
    <ion-tab title="REWARDS" icon="ion-wand" href="#/page1/page21" id="tabsController-tab2">
        <ion-nav-view name="tab2"></ion-nav-view>
    </ion-tab>
    <ion-tab title="MORE" icon="ion-ios-more" href="#/page1/page18" id="tabsController-tab3">
        <ion-nav-view name="tab3"></ion-nav-view>
    </ion-tab>
</ion-tabs>

thanks for ionic wonderful support team