windows 10 multi window bug when using examples\multiple_windows

Steps to reproduce

I ran flutter config --enable-windowing
enable-windowing: true (It says "Unavailable", will this affect anything?)
Then I ran examples\multiple_windows

System Version: Windows 10 Pro, 22H2 (OS Build 19045.6466)

Note: I also tested this on Windows 11 and it works well (no issues opening/closing windows). The problem happens on Windows 10, where opening, closing, activating, and maximizing all have severe issues. Almost none of the functionality works.

Expected results

Multiple windows open, close, activate, and maximize normally.

Actual results

There are severe issues with opening, closing, activating, and maximizing. I'll upload a screen recording shortly.

Code sample

flutter\examples\multiple_windows

Screenshots or Video

https://github.com/110jiangnan/repo01/blob/master/video_20260514_224528_edit.mp4
https://github.com/110jiangnan/repo01/blob/master/video_20260514_224556_edit.mp4

Logs

[Paste your logs here]

Flutter Doctor output

Doctor output

[Paste your output here]

flutter 是在运行的，但是似乎录屏也没有录取到flutter的窗口

https://github.com/110jiangnan/repo01/blob/master/video_20260514_224528_edit.mp4
https://github.com/110jiangnan/repo01/blob/master/video_20260514_224556_edit.mp4
手机拍摄的运行视频

@110jiangnan

@110jiangnan Thanks for reporting this.
We request that all issues be submitted in English so that entire team can properly investigate.
Could you please update the issue report?
You can use a translation tool if needed.

Thanks

@puneetkukreja98

@puneetkukreja98
Steps to reproduce
I ran flutter config --enable-windowing
enable-windowing: true (Unavailable? Will this affect the run?)
Then I ran examples\multiple_windows
System Version: Windows 10 Pro
Version: 22H2
Installation Date: 2023/3/29
OS Build: 19045.6466
The bug is very strange.

Here is a screen recording of the computer in the first comment.

Additionally, I tested this case on Windows 11 and it was fine; there were no issues with opening or closing windows.
It's just when testing on Windows 10, opening, closing, activating, and maximizing all have serious problems; almost no feature is usable.

Expected results
Multiple windows opening, closing, activating, and maximizing normally.
Actual results
Opening, closing, activating, and maximizing all have serious problems. I will upload the screen recording.

The bug is very strange. The Flutter windows were not captured by screen recording software, so I recorded the screen using a mobile phone.

The videos have been uploaded to my repository:
Video 1: Flutter Multiple Windows Test - Part 1
Video 2: Flutter Multiple Windows Test - Part 2

@110jiangnan

@110jiangnan
I tested the examples\multiple_windows sample on Windows 11 Pro, and actions (opening, closing, minimizing, and maximizing via the "Regular" button) are working, but I did notice a error appearing in console.
Win 11 pro logs:

══╡ EXCEPTION CAUGHT BY GESTURES LIBRARY ╞══════════════════════════════════════════════════════════
The following assertion was thrown while handling a pointer data packet:
Cannot hit test a render box that has never been laid out.
The hitTest() method was called on this RenderBox: RenderSemanticsAnnotations#ccf2b NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE:
  creator: Semantics ← _FocusInheritedScope ← Focus ← Shortcuts ←
    NotificationListener<NavigationNotification> ← _SharedAppModel ← SharedAppData ←
    UnmanagedRestorationScope ← RestorationScope ← UnmanagedRestorationScope ← RootRestorationScope ←
    WidgetsApp-[GlobalObjectKey _MaterialAppState#e03a2] ← ⋯
  parentData: <none>
  constraints: MISSING
  size: MISSING
Unfortunately, this object's geometry is not known at this time, probably because it has never been
laid out. This means it cannot be accurately hit-tested.
If you are trying to perform a hit test during the layout phase itself, make sure you only hit test
nodes that have completed layout (e.g. the node's children, after their layout() method has been
called).

When the exception was thrown, this was the stack:
#0      RenderBox.hitTest.<anonymous closure> (package:flutter/src/rendering/box.dart:2920:11)
#1      RenderBox.hitTest (package:flutter/src/rendering/box.dart:2951:6)
#2      RenderView.hitTest (package:flutter/src/rendering/view.dart:309:12)
#3      RendererBinding.hitTestInView (package:flutter/src/rendering/binding.dart:662:34)
#4      RendererBinding.initMouseTracker.<anonymous closure> (package:flutter/src/rendering/binding.dart:459:11)
#5      MouseTracker.updateWithEvent (package:flutter/src/rendering/mouse_tracker.dart:310:43)
#6      RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:466:20)
#7      GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:437:7)
#8      GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:394:5)
#9      GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:341:7)
#10     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:308:9)
#11     _invoke1 (dart:ui/hooks.dart:439:13)
#12     PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:470:7)
#13     _dispatchPointerDataPacket (dart:ui/hooks.dart:374:31)
════════════════════════════════════════════════════════════════════════════════════════════════════

However, since this issue appears to be specific to Windows 10

Could you please run the example again on your Windows 10 machine and paste the complete terminal logs here?
Could you please also share flutter doctor -v o/p

Flutter doctor -v

[√] Flutter (Channel master, 3.44.0-0.3.pre, on Microsoft Windows [Version 10.0.26200.7840], locale en-IN) [2.3s]
    • Flutter version 3.44.0-0.3.pre on channel master at C:\Developer\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision b7ac273fa0 (3 months ago), 2026-02-26 09:02:27 -0500
    • Engine revision b7ac273fa0
    • Dart version 3.12.0 (build 3.12.0-178.0.dev)
    • DevTools version 2.55.0
    • 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-lldb-debugging, enable-uiscene-migration, enable-riscv64

[√] Windows Version (Windows 11 or higher, 25H2, 2009) [2.7s]

[√] Android toolchain - develop for Android devices (Android SDK version 36.1.0) [6.6s]
    • Android SDK at C:\Users\Puneet\AppData\Local\Android\sdk
    • Emulator version 36.4.9.0 (build_id 14788078) (CL:N/A)
    • Platform android-36.1, build-tools 36.1.0
    • Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
      This is the JDK bundled with the latest Android Studio installation on this machine.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment (build 21.0.9+-14649483-b1163.86)
    • All Android licenses accepted.

[√] Chrome - develop for the web [362ms]
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop Windows apps (Visual Studio Community 2026 18.3.2) [359ms]
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\18\Community
    • Visual Studio Community 2026 version 18.3.11520.95
    • Windows 10 SDK version 10.0.26100.0

[√] Connected device (3 available) [329ms]
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.26200.7840]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 147.0.7727.56
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 147.0.3912.60

[√] Network resources [636ms]
    • All expected network resources are available.

• No issues found!

@puneetkukreja98

@puneetkukreja98
I suggest the official team run the relevant test cases in a Windows 10 environment. If possible, please cover different release versions of Windows 10 for verification.
Currently, the multi-window feature has severe stability issues on Windows 10, far beyond the single scenario mentioned above. Our actual testing found that operations involving opening, closing, and managing multiple windows have a very high probability of causing the application to crash or the interface to fail to display. This severely impacts production usability, and I kindly request that this be prioritized for investigation.

@puneetkukreja98

@puneetkukreja98
Our team is experiencing the same issue, which significantly hurts multi-window usability on Windows 10. Could you share the ongoing tracking for this issue?

@110jiangnan

@110jiangnan If you have a moment, can you try out #187848 ? That should fix windows failing to open on Win10 😄

Remove EnableTransparentWindowBackground because it did nothing impor…

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

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windows 10 multi window bug when using examples\multiple_windows #186522

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windows 10 multi window bug when using examples\multiple_windows #186522

Description

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Expected results

Actual results

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110jiangnan commented on May 14, 2026

110jiangnan commented on May 14, 2026

puneetkukreja98 commented on May 15, 2026

110jiangnan commented on May 15, 2026

puneetkukreja98 commented on May 18, 2026

110jiangnan commented on May 19, 2026

PierceCK commented on Jun 2, 2026

mattkae commented on Jun 11, 2026

github-actions commented on Jul 14, 2026

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