WinUI3 preview 3 - Shadow animation of opened flyouts is shown twice

[lhak]

Describe the bug

When a MenuFlyout is opened, the shadow animation is shown twice

Steps to reproduce the bug

1. Create a new application
2. Add the following XAML:

<Grid  ContextFlyout="{x:Bind TestFlyout}">
  <Grid.Resources>
    <MenuFlyout x:Name="TestFlyout" >
      <MenuFlyoutItem Text="Test"/>
    </MenuFlyout>
  </Grid.Resources>
</Grid>

Open the context menu

Expected behavior

Animation should only be shown once

Screenshots

No response

NuGet package version

No response

Windows app type

• UWP
• Win32

Device form factor

Desktop

Windows version

Insider Build (xxxxx)

Additional context

No response

[seven-mile]

The shadow animation of most user flyouts indeed flicker. (Is it losing focus?)

But the menu flyout of CommandBar seems to work correctly. Why?

(If the GIF stopped, open it in a new tab) FYI.

[StephenLPeters]

@codendone FYI

[bogdan-patraucean]

I'm having the same problem, it's only happening in WASDK apps.

[lhak]

This is still an issue in the latest 1.3 release. There is a short flicker before the shadow animation is played.

[ranjeshj]

This looks fixed in WASDK 1.4 !