When the Minimum property is changed, the Value property becomes null.

Hello,

There is unexpected behavior with the Int32EditBox. Could you please confirm whether this is intended behavior or a bug?

• Issue:
  When the Minimum property is changed, the Value property becomes null.
• Steps to Reproduce:

1. 1. Build the following XAML code
      

      <Window x:Class="WpfApp1.MainWindow"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:editors="http://schemas.actiprosoftware.com/winfx/xaml/editors"
              Title="MainWindow" Height="200" Width="300">
          <StackPanel>
              <editors:Int32EditBox x:Name="input" IsNullAllowed="False"/>
              <editors:Int32EditBox x:Name="output" Minimum="{Binding Value, ElementName=input}" IsNullAllowed="False"/>
          </StackPanel>
      </Window>
      ​

   2. Click the Increment button of the upper Int32EditBox twice
   3. The Value property of the lower Int32EditBox becomes null

• Expected Behavior:
  The value 2 is displayed in the Int32EditBox.
• Actual Behavior:
  The Int32EditBox is blank/empty. The Value property is null.

Best regards, Yuki Ogawa