C# Wpf-ICollectionView刷新导致样式覆盖失败

我有菜单项的默认样式和上下文菜单样式，如下所示：

<ResourceDictionary>
    <Style TargetType="{x:Type MenuItem}">
         <Setter Property="Background" Value="Blue"/>
         <Setter Property="Foreground" Value="White" />
    </Style>
    <Style TargetType="{x:Type ContextMenu}">
        <Setter Property="Background" Value="LightBlue"/>
    </Style> 
</ResourceDictionary>

<ListView.Resources>
    <Style TargetType="{x:Type MenuItem}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="Foreground" Value="Black" />
    </Style>
    <Style TargetType="{x:Type ContextMenu}">
        <Setter Property="Background" Value="WhiteSmoke"/>
    </Style>
    <ContextMenu x:Key="ItemContextMenu" ItemsSource="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=UserControl}, Path=ContMenu}"/>
</ListView.Resources>
<ListView.ItemContainerStyle>
    <Style BasedOn="{StaticResource ListItemsStretched}" TargetType="{x:Type ListViewItem}">
        <Setter Property="ContextMenu" Value="{StaticResource ItemContextMenu}"/>
    </Style>
</ListView.ItemContainerStyle>

当在绑定到可观察集合的listview项上显示上下文菜单时，我需要覆盖样式，如下所示：

<ResourceDictionary>
    <Style TargetType="{x:Type MenuItem}">
         <Setter Property="Background" Value="Blue"/>
         <Setter Property="Foreground" Value="White" />
    </Style>
    <Style TargetType="{x:Type ContextMenu}">
        <Setter Property="Background" Value="LightBlue"/>
    </Style> 
</ResourceDictionary>

<ListView.Resources>
    <Style TargetType="{x:Type MenuItem}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="Foreground" Value="Black" />
    </Style>
    <Style TargetType="{x:Type ContextMenu}">
        <Setter Property="Background" Value="WhiteSmoke"/>
    </Style>
    <ContextMenu x:Key="ItemContextMenu" ItemsSource="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=UserControl}, Path=ContMenu}"/>
</ListView.Resources>
<ListView.ItemContainerStyle>
    <Style BasedOn="{StaticResource ListItemsStretched}" TargetType="{x:Type ListViewItem}">
        <Setter Property="ContextMenu" Value="{StaticResource ItemContextMenu}"/>
    </Style>
</ListView.ItemContainerStyle>

在收到在绑定ObservableCollection中创建的事件以在任何属性发生更改时通知我之前，这一切都可以正常工作，这样我就可以刷新ICollectionView，从而使listview的当前排序保持为true。但是，如果此事件发生时列表视图上的关联菜单处于打开状态，它将恢复为默认样式，而不是替代样式

在这方面有什么帮助吗？我怀疑我忽略了一些简单的事情