WebView2 does not paint correctly when Form.Enabled is set to false

Description
When you execute WebView2.FindForm().Enable = false; on an enabled form, then the WebView2 will go blank.
We expect it to remain the same, all it should do is not accept user input anymore.

Version
SDK: 1.0.865-prerelease
Runtime: Stable 90.0.818.51
Framework: WinForms
OS: Win10 Version 20H2

Repro Steps
We use the following code:

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

using Microsoft.Web.WebView2.WinForms;

namespace WebView2BugFormEnabled
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(CreateTestForm());
        }

        public static Form CreateTestForm()
        {
            var form = new Form
            {
                Size = new Size(1280, 1024)
            };

            var webView2 = new WebView2
            {
                Dock = DockStyle.Fill,
                Source = new Uri(@"https://github.com/MicrosoftEdge/WebView2Feedback/")
            };

            webView2.KeyDown += (sender, e) =>
            {
                webView2.FindForm().Enabled = !webView2.FindForm().Enabled;
            };

            form.Controls.Add(webView2);

            return form;
        }
    }
}

When a key is pressed inside the web view, like F8, then the browser will go blank.

AB#33093019

Start with the supplied WinForms entry point, especially CreateTestForm and its WebView2 key handler, and reproduce the blank view when Form.Enabled is set to false. Investigate the WebView2 WinForms behavior involved in disabling the form; done means the page remains painted while the disabled form no longer accepts user input.