【报Bug】页面首次切换会出现短暂白屏问题

示例代码：

,app.js里面只有简单的tabBar声明 没个页面也只有简陋的样式
app.js

{  
  "pages": [  
    "pages/index/index",  
    "pages/list/index",  
    "pages/history/index",  
    "pages/user/index",  
    "pages/login/index",  
    "pages/login/form"  
  ],  

  "window": {  
    "navigationBarTitleText": "标题",  
    "navigationBarTextStyle": "white",  
    "navigationBarBackgroundColor": "#121325",  
    "backgroundColor": "#252735",  
    "backgroundColorBottom": "#252735",  
    "onReachBottomDistance": 300  
  },  
  "tabBar": {  
    "color": "#A1A3B5",  
    "selectedColor": "#ffffff",  
    "backgroundColor": "#252735",  
    "list": [  
      {  
        "pagePath": "pages/index/index",  
        "text": "首页",  
        "iconPath": "/static/images/tabbar/home.png",  
        "selectedIconPath": "/static/images/tabbar/home_white.png"  
      },  
      {  
        "pagePath": "pages/list/index",  
        "text": "片库",  
        "iconPath": "static/images/tabbar/list.png",  
        "selectedIconPath": "static/images/tabbar/list_white.png"  
      },  
      {  
        "pagePath": "pages/history/index",  
        "text": "历史",  
        "iconPath": "static/images/tabbar/history.png",  
        "selectedIconPath": "static/images/tabbar/history_white.png"  
      },  
      {  
        "pagePath": "pages/user/index",  
        "text": "我的",  
        "iconPath": "static/images/tabbar/user.png",  
        "selectedIconPath": "static/images/tabbar/user_white.png"  
      }  
    ]  
  },  
  "component2": true,  
  "usingComponents": {}  
}

ttml

<view><view class="white--text">1</view><view style="background:#f00;">1</view></view>

操作步骤：

点击下方tabbar切换页面

预期结果：

保留设置的底色 "backgroundColor": "#252735" 来进行页面直接的切换

实际结果：

内容部分会出现 短暂白屏 如上图所示