Menu bar problem

when menu bar open and close my body content become white or half white in ionic 3 .

I have problem in ionic 3 when I open the menu bar and close this in android device my body content would white or half white.Please tell me what is wrong with my code, i face this problem long time

app.html

<ion-menu type="reveal" [content]="content">
  <ion-header>
    <ion-toolbar style="padding-top:65px;padding-bottom:65px;" class="bg1">
    </ion-toolbar>
  </ion-header>

  <ion-content style="margin-top:10px;" class="bg3">
       <p>Home</p>
  </ion-content>
</ion-menu>
<ion-nav [root]="rootPage" #content swipeBackEnabled="false"></ion-nav>

<ion-header>
  <ion-navbar>
    <button ion-button menuToggle>
      <ion-icon name="menu"></ion-icon>
    </button>
    <ion-title>Home</ion-title>
  </ion-navbar>
</ion-header>

<ion-content class="bg"> 
  <ion-card>
    <img src="assets/imgs/nin-live.png">
  </ion-card>
  <ion-card>
    <img src="assets/imgs/nin-live.png">
  </ion-card>
  <ion-card>
    <img src="assets/imgs/nin-live.png">
  </ion-card>
  <ion-slides>
    <ion-slide>
      <h1>Slide 1</h1>
    </ion-slide>
    <ion-slide>
      <h1>Slide 2</h1>
    </ion-slide>
    <ion-slide>
      <h1>Slide 3</h1>
    </ion-slide>
  </ion-slides>
  <ion-row>
    <ion-col col-6>
      Contact
    </ion-col>
    <ion-col col-6>
      About
    </ion-col>
  </ion-row>
</ion-content>

home.html