When a user control has Browsable false on public property, why does designer set it to null when added to a form?

I have a user control that has a few public properties, one is an object where I set [Browseable(false)]. When I add this control in Visual Studio's designer the generated code sets this object to null.

public class Foo : System.Windows.Forms.UserControl
{
    [Browsable(false)]
    public object Bar { get; set; }

    [Browsable(true)]
    public bool IsSomething { get; set; }

    ...
}

private void InitializeComponent()
{
    ...
    this.foo = new Foo();

    this.foo.IsSomething = false;
    this.foo.Bar = null;
    ...
}

I don't understand why Visual Studio would want to do that and I'm curious if there is a way to mark it so that it doesn't set it. I discovered this by setting the object to something in the constructor only to watch the contol's parent set it back to null.