鸿蒙scrollview 嵌套 webview 在滑动过程中遮挡 下面的组件

这个是父布局 

<DependentLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:orientation="vertical">

    <StackLayout
        ohos:id="$+id:stack_layout"
        ohos:height="match_parent"
        ohos:width="match_parent"
        ohos:above="$id:bar"
        />

    <com.ashokvarma.bottomnavigation.BottomNavigationBar
        ohos:id="$+id:bar"
        ohos:height="56vp"
        ohos:width="match_parent"
        ohos:align_parent_bottom="true"/>
</DependentLayout>

这个是StackLayout 替换的fraction 布局

<ScrollView
    ohos:height="match_parent"
    ohos:width="match_parent">

    <DirectionalLayout
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:orientation="vertical">

        <DependentLayout
            ohos:height="match_content"
            ohos:width="match_parent">
          
           <...>
        <ohos.agp.components.webengine.WebView
            ohos:id="$+id:webview1"
            ohos:height="390vp"
            ohos:width="match_parent"/>