Problem when changing WebView2 control’s parent visibility

Our development:
SDK: 1.0.705.50/1.0.774.44
Runtime: Canary 91.0.830.0 x64
Framework: .NET Core 3.1, WPF, x64
OS: Windows 10 Pro x64

We have simple problem when we change visibility of WebView2 control's parent with WebView2 and Edge Canary. In WPF we put Canvas on Grid and on Grid we have WebView2 control. Canvas has Visibility = Hidden, like below:

<Grid Background="Aqua">
    <Canvas Name="Can" Width="500" Height="500" Visibility="Hidden">
        <wpf:WebView2 Name="Web" Width="500" Height="500" />
    </Canvas>
</Grid>

After that we load sample HTML document, when application starts, Canvas is hidden:

public MainWindow()
{
    InitializeComponent();
    Web.Source = new Uri(AppDomain.CurrentDomain.BaseDirectory + "sample.html");
} 

After few seconds, we change Canvas Visibility to true:

Application.Current.Dispatcher.Invoke(() =>
{
    Can.Visibility = Visibility.Visible;
});

Our result:
https://pagspzoo-my.sharepoint.com/:i:/g/personal/lukasz_kozek_pag_com_pl/EabQlEZxS_lFjNZVeXvdIDkBtlQ4MglClzCnfSDpnNRGYQ

We don’t see HTML document, only gray field. When we minimize and maximize main window, HTML shows. Grey field we can see in 1.0.705.50 of WebView2 version.
When we upgarde this control to 1.0.774.44 version, we don’t see grey field, only Grid with Aqua color. We have the same situation like above, after minimize and maximize main window, HTML shows.

Below I share source of sample application. First, with older version WebView2 and grey field, and newest version.

Source with 1.0.705.50 (gray field)
https://pagspzoo-my.sharepoint.com/:u:/g/personal/lukasz_kozek_pag_com_pl/EQMNEObCCsZMmUzm7QztIQcBTxxgkLMRiEgDRuVDVWprkg?e=h8lHBf

Source with 1.0.774.44
https://pagspzoo-my.sharepoint.com/:u:/g/personal/lukasz_kozek_pag_com_pl/ESsadCGN0zJOpTB03KaJ0iYBCJ4LvjjbNwBDNUQ1zwpTqQ?e=GTx0Ns

Thank You for any advice.

AB#32255210

Start with the supplied WPF XAML and MainWindow constructor, then reproduce the behavior when Canvas.Visibility changes through Dispatcher.Invoke. Compare WebView2 SDK versions 1.0.705.50 and 1.0.774.44, using the linked sample applications and sample.html. Done means the HTML renders after the parent becomes visible without minimizing and maximizing the window.