[Windows][MultiView] hitch/freeze when interacting with child window's title bar #176480
Description
Steps to reproduce
- Run examples/multiple_windows
- Open the child window from the main window.
- Click and/or drag the title bar of the child window repeatedly.
- Observe the noticeable stutter or freeze in the child window's rendering during the interaction.
Expected results
The interaction with the child window's title bar should be smooth, with no perceptible rendering stalls.
Actual results
There is a clear and consistent performance hitch every time the title bar is clicked or dragged.
Code sample
Code sample
[Paste your code here]Screenshots or Video
Screenshots / Video demonstration
2025104-2386.mp4
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
[√] Flutter (Channel master, 3.37.0-1.0.pre-400, on Microsoft Windows [版本 10.0.26100.6584], locale zh-CN) [2.4s]
• Flutter version 3.37.0-1.0.pre-400 on channel master at D:\flutter\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 5c0c9e9e9a (3 hours ago), 2025-10-03 11:49:25 -0400
• Engine revision dca709fbbf
• Dart version 3.10.0 (build 3.10.0-278.0.dev)
• DevTools version 2.50.0
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android,
enable-ios, cli-animations, enable-native-assets, omit-legacy-version-file, enable-windowing,
enable-lldb-debugging
[√] Windows Version (Windows 11 or higher, 24H2, 2009) [1,516ms]