DataTemplate only shows Canvas for the last record - wpf

Question

I'm using the following DataTemplate
<DataTemplate x:Key="platform_resources">
<StackPanel Orientation="Horizontal">
<Viewbox Width="30" Height="30" ToolTip="Network Domain Count" Stretch="Uniform">
<ContentControl DataContext="{Binding}" Focusable="False" Content="{DynamicResource appbar_server}" />
</Viewbox>
<TextBlock Margin="0,7,0,0" Text="{Binding Path=workload_count}"/>
<Separator Style="{StaticResource {x:Static ToolBar.SeparatorStyleKey}}" />
<Viewbox Width="30" Height="30" ToolTip="Logical Network Count" Stretch="Uniform">
<ContentControl Focusable="False" Content="{DynamicResource appbar_network_server_connecting}" />
</Viewbox>
<TextBlock Margin="0,7,0,0" Text="{Binding Path=vlan_count}"/>
<Separator Style="{StaticResource {x:Static ToolBar.SeparatorStyleKey}}" />
<Viewbox Width="30" Height="30" ToolTip="Network Domain Count" Stretch="Uniform">
<ContentControl Focusable="False" Content="{DynamicResource appbar_network}" />
</Viewbox>
<TextBlock Margin="0,7,0,0" Text="{Binding Path=networkdomain_count}"/>
</StackPanel>
</DataTemplate>
The template displays all the relevant data with separators but only shows the images on the last record. It's leaves spaces where the images are supposed to be, but no images.

Answer 1

Make sure you add x:Shared="False" property to your resources.
Example:
<Canvas x:Key="appbar_server" x:Shared="False">
<!-- ... -->
</Canvas>

Answer 2

This happens because you probably defined some Images (e.g appbar_server) in your resources and trying to display them in multiple items. But Image is a Visual and in WPF each Visual can only have one parent. So when your items are being generated, each item steals the Image from the previous one until the last item finally gets it.
Solution:
Unlike Image, BitmapImage is not a Visual and thus can be set multiple times as the source of different items. So instead of defining Images in your Resources, define BitmapImages:
<Window.Resources>
<BitmapImage x:Key="appbar_server" UriSource="C:\...\appbar_server.png"/>
....
And then instead of ContentControls create Image instances in your DataTemplate to present them:
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Viewbox Width="30" Height="30" ToolTip="Network Domain Count" Stretch="Uniform">
<Image Focusable="False" Source="{DynamicResource appbar_server}" />
</Viewbox>
<TextBlock Margin="0,7,0,0" Text="{Binding Path=workload_count}"/>
...
*Update:
The image is captured in a canvas which seems to be needing some
special wrapper to make this work.
In that case, you should define a DataTemplate for each Canvas like this:
<Window.Resources>
<DataTemplate x:Key="appbar_3d_3ds">
<Canvas Width="76" Height="76" Clip="F1 M 0,0L 76,0L 76,76L 0,76L 0,0">
<Path Width="32" Height="40" Canvas.Left="23" Canvas.Top="18" Stretch="Fill" Fill="Black" Data="F1 M 27,18L 23,26L 33,30L 24,38L 33,46L 23,50L 27,58L 45,58L 55,38L 45,18L 27,18 Z "/>
</Canvas>
</DataTemplate>
....
And then create ContentPresenter Instances in your ItemTemplate with their ContentTemplate set to your pre-defined data templates (e.g. appbar_3d_3ds).
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Viewbox Width="30" Height="30" ToolTip="Network Domain Count" Stretch="Uniform">
<ContentPresenter ContentTemplate="{DynamicResource appbar_3d_3ds}"/>
</Viewbox>
<TextBlock Margin="0,7,0,0" Text="{Binding Path=workload_count}"/>
....