[Problem/Bug]: The playing video behind Webview2 will pass through Webview2 WPF window when the webview2 re-rendering

[Taoduhui]

What happened?

The playing video behind Webview2 will pass through Webview2 WPF window when the webview2 re-rendering in low resolution enviroments

MicrosoftTeams-video.3.mp4

Importance

Moderate. My app's user experience is affected, but still usable.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

127.0.2651.74

SDK Version

1.0.1418.22 & 1.0.2592.51

Framework

WPF

Operating System

Windows 11

OS Version

26100.1150 & 26100.1301

Repro steps

Enviroment:

• Win11 24H2 26100.1150 & 26100.1301
• Webview Runtime: 127.0.2651.74
• Webview NuGet: 1.0.1418.22 & 1.0.2592.51
• WPF
• display resolution: 1280x1024

Steps to repro:

• Create a blank WPF program using .net framework 4.7.2 or .net 6
• Install Webview NuGet: 1.0.1418.22 or 1.0.2592.51
• Complete the program base on MSDN WebView2 Demo
• Make sure the enviroment is same as the Enviorment Section
• Open any video using Win11 Media Player, maximize the window, pause.
• Run the WebView Demo program, maximize the window.
• Switch to the media player, play the video
• Switch back to the Demo Program. (make sure the media player is the last actived window before demo program)
• hover on any button or tootip will cause re-rendering.
• The playing video behind Webview2 will pass through Webview2 WPF window when the webview2 re-rendering and keep flashing [1]
  Expected results:
• The playing video behind Webview2 should not pass through Webview2 WPF window when the webview2 re-rendering and keep flashing [1]
  Actual results:
• The playing video behind Webview2 pass through Webview2 WPF window when the webview2 re-rendering and keep flashing [1]

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

No response