AvaloniaUI: Resource in DataTemplate not found

MainWindow.xaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:AvaloniaBugTest;assembly=AvaloniaBugTest"
        Title="AvaloniaBugTest" Width="500" Height="500">
  <Window.Resources>
    <local:SharedBrush x:Key="ResBackground" Value="White" />
    <local:SharedBrush x:Key="ResForeground" Value="Blue" />
  </Window.Resources>
  <DockPanel>
    <ListBox Width="200">
      <ListBox.ItemTemplate>
        <DataTemplate>
          <TextBlock 
            Text="{Binding Value}" 
            Background="{Binding Source={DynamicResource ResBackground},Path=Value}" 
            Foreground="{Binding Source={StaticResource ResForeground},Path=Value}" />
        </DataTemplate>
      </ListBox.ItemTemplate>
      <ListBox.Items>
          <local:ListItemViewModel Value="Item 1" />
          <local:ListItemViewModel Value="Item 2" />
          <local:ListItemViewModel Value="Item 3" />
      </ListBox.Items>
    </ListBox>
    <StackPanel>
      <DropDown SelectedItem="{Binding Source={StaticResource ResBackground},Path=Value,Mode=TwoWay}">
        <DropDown.ItemTemplate>
          <DataTemplate>
            <TextBlock Text="{Binding Color}" Foreground="{Binding}" />
          </DataTemplate>
        </DropDown.ItemTemplate>
        <DropDown.Items>
          <SolidColorBrush Color="White" />
          <SolidColorBrush Color="Black" />
          <SolidColorBrush Color="Red" />
          <SolidColorBrush Color="Blue" />
          <SolidColorBrush Color="Green" />
        </DropDown.Items>
      </DropDown>
      <DropDown SelectedItem="{Binding Source={StaticResource ResForeground},Path=Value,Mode=TwoWay}">
        <DropDown.ItemTemplate>
          <DataTemplate>
            <TextBlock Text="{Binding Color}" Foreground="{Binding}" />
          </DataTemplate>
        </DropDown.ItemTemplate>
        <DropDown.Items>
          <SolidColorBrush Color="White" />
          <SolidColorBrush Color="Black" />
          <SolidColorBrush Color="Red" />
          <SolidColorBrush Color="Blue" />
          <SolidColorBrush Color="Green" />
        </DropDown.Items>
      </DropDown>
    </StackPanel>
  </DockPanel>
</Window>

MainWindow.xaml.cs

using System.ComponentModel;
using System.Runtime.CompilerServices;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Diagnostics.ViewModels;
using Avalonia.Markup.Xaml;
using Avalonia.Markup.Xaml.Data;
using Avalonia.Media;
using AvaloniaBugTest.Annotations;

namespace AvaloniaBugTest
{
    public class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
#if DEBUG
            this.AttachDevTools();
#endif
        }

        private void InitializeComponent()
        {
            var b = new Binding();
            AvaloniaXamlLoader.Load(this);
        }
    }

    public class ListItemViewModel : ViewModelBase
    {
        private string _value;

        public string Value
        {
            get { return _value; }
            set { RaiseAndSetIfChanged(ref _value, value); }
        }
    }

    public class SharedBrush : ViewModelBase
    {
        private IBrush _value;

        public IBrush Value
        {
            get { return _value; }
            set { RaiseAndSetIfChanged(ref _value, value); }
        }
    }
}