Double autocompletebox dropdown about avalonia HOT 3 CLOSED

<Style Selector="AutoCompleteBox">
	<!-- Default font size of the Application -->
	<Setter Property="IsTextCompletionEnabled" Value="True"/>
	<Setter Property="MinimumPrefixLength" Value="0"/>
</Style>
<Style Selector="AutoCompleteBox">
        <Setter Property="CornerRadius" Value="{DynamicResource CornerRadius}"/>
</Style>
<Style Selector="AutoCompleteBox.Expr">
        <Setter Property="Background" Value="{DynamicResource ExprColor}"/>
</Style>
<Style Selector="AutoCompleteBox.Director">
       <Setter Property="Background" Value="{DynamicResource DirectorColor}"/>
</Style>
<Style Selector="AutoCompleteBox.Mandatory">
       <Setter Property="Background" Value="{DynamicResource MandatoryColor}"/>
</Style>