can't mix IsCheckable values in DropDownButton menuitems

[TheCamel]

Describe the bug

can't mix IsCheckable items in DropDownButton when using the items source collection

try also with StyleSelector

any idea for a work around or another solution ?

Steps to reproduce

bind one to a collection and add the prop below to the control

<mah:DropDownButton Margin="5 5 10 5"
								Padding="8"
								Content="{DynamicResource DisplayMode.Title}"
								DisplayMemberPath="Header"
								ItemsSource="{Binding Displays}">
				<mah:DropDownButton.Icon>
					<mah:PathIcon Width="18"
								  Height="18"
								  Margin="6"
								  Data="M9,6H5V10H7V8H9M19,10H17V12H15V14H19M21,16H3V4H21M21,2H3C1.89,2 1,2.89 1,4V16A2,2 0 0,0 3,18H10V20H8V22H16V20H14V18H21A2,2 0 0,0 23,16V4C23,2.89 22.1,2 21,2" />
				</mah:DropDownButton.Icon>
				<mah:DropDownButton.ItemContainerStyle>
					<Style BasedOn="{StaticResource {x:Type MenuItem}}"
						   TargetType="{x:Type MenuItem}">
						<Setter Property="Command"
								Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type mah:DropDownButton}}, Path=DataContext.ChangeDisplayModeCommand}" />
						<Setter Property="CommandParameter"
								Value="{Binding Mode}" />
**<Setter Property="IsCheckable"
								Value="{Binding WhatYouWant}" />**
					</Style>
				</mah:DropDownButton.ItemContainerStyle>

Expected behavior

the problem is for items with sub items, it can't be checkable because it does not displays subs

Actual behavior

it has no effect.

it seems it is all checkable or not

Environment

Target Framework: .Net Core 8