IonicPrevious-title-button not Shown sometime


#1

    <ion-nav-buttons side="right">
          <a  href="#/app/search/Classifieds"> <button  class="button button-icon icon ion-ios-search" style="color:white" ></button></a>
    </ion-nav-buttons>

i wrote like that


#2

somtime like this ,
check this out in inspect element ,it show .hide class in button tag