[Windows][ARM64] Touchscreen taps misaligned from widgets (large offset); mouse is correct — regression after 5f58b37fdaa

### Steps to reproduce

On Windows 11 ARM64, install Flutter master at a recent framework revision.
flutter create touch_offset_repro
cd touch_offset_repro
flutter run -d windows (or flutter build windows and run the Release/Profile exe).
Use the touchscreen (finger) to tap the FAB and any tappable UI several times.
Optionally repeat with the trackpad/mouse: taps land on the intended targets.

### Expected results

Finger touches should hit the same widgets under the finger as the mouse/trackpad (same as native Windows apps and same as older Flutter on the same machine).

### Actual results

Finger touches still activate widgets, but the effective hit position is wrong by a large, roughly constant offset (on my device, on the order of ~1.5 inches on the panel). Mouse/trackpad is correct. Windows shell (Start, taskbar, other apps) is correct — only the Flutter app is wrong.

Regression check: On the same machine, checking out Flutter framework 5f58b37fdaa (reported app version around 3.43.0-0.3.pre) and building/running the same project: touch is correct. So something regressed after that framework revision on master.

### Code sample

<details open><summary>Default flutter create template is enough (counter app). No custom code required. If you want a single-file sanity check, this is equivalent to the template’s interaction surface:</summary>

```dart
import 'package:flutter/material.dart';

void main() => runApp(const MaterialApp(home: Scaffold(body: Center(child: Text('Tap FAB with finger vs mouse')))));
```

</details>


### Screenshots or Video

<details open>
<summary>Screenshots / Video demonstration</summary>

[Upload media here]

</details>


### Logs

<details open><summary>Logs</summary>

```console
[Paste your logs here]
```

</details>


### Flutter Doctor output

<details open><summary>I pasted the first one where it's broken and the second output is where I found it still worked, so you can see where it stopped working</summary>

```console
[√] Flutter (Channel master, 3.43.0-1.0.pre-570, on Microsoft Windows
    [Version 10.0.26200.8117], locale en-US) [1,771ms]
    • Flutter version 3.43.0-1.0.pre-570 on channel master at
      C:\Users\david\develop\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision b1876d8b31 (12 hours ago), 2026-04-12 11:17:27
      -0400
    • Engine revision b1876d8b31
    • Dart version 3.13.0 (build 3.13.0-10.0.dev)
    • DevTools version 2.57.0
    • Feature flags: enable-web, enable-linux-desktop,
      enable-macos-desktop, enable-windows-desktop, enable-android,
      enable-ios, cli-animations, enable-native-assets,
      enable-swift-package-manager, omit-legacy-version-file,
      enable-lldb-debugging, enable-uiscene-migration, enable-riscv64

[√] Windows Version (Windows 11 or higher, 25H2, 2009) [789ms]

[√] Android toolchain - develop for Android devices (Android SDK version
    35.0.0) [2.5s]
    • Android SDK at C:\Android\Sdk
    • Emulator version unknown
    • Platform android-36, build-tools 35.0.0
    • ANDROID_HOME = C:\Android\Sdk
    • ANDROID_SDK_ROOT = C:\Android\Sdk
    • Java binary at: C:\Program
      Files\Microsoft\jdk-17.0.18.8-hotspot\bin\java.exe
      This JDK was found in the system PATH.
      To manually set the JDK path, use: `flutter config
      --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment Microsoft-13107724 (build
      17.0.18+8-LTS)
    • All Android licenses accepted.

[√] Chrome - develop for the web [223ms]
    • CHROME_EXECUTABLE = C:\Program Files
      (x86)\Microsoft\Edge\Application\msedge.exe

[√] Visual Studio - develop for Windows apps (Visual Studio Community 2026
    18.3.0) [222ms]
    • Visual Studio at C:\Program Files\Microsoft Visual
      Studio\18\Community
    • Visual Studio Community 2026 version 18.3.11505.172
    • Windows 10 SDK version 10.0.26100.0

[√] Connected device (3 available) [2.5s]
    • Windows (desktop) • windows • windows-arm64  • Microsoft Windows
      [Version 10.0.26200.8117]
    • Chrome (web)      • chrome  • web-javascript • unknown
    • Edge (web)        • edge    • web-javascript • Microsoft Edge
      146.0.3856.109

[√] Network resources [391ms]
    • All expected network resources are available.

• No issues found!
```

```console
     [!] Flutter (Channel [user-branch], 3.43.0-0.3.pre, on Microsoft Windows [Version 10.0.26200.8117], locale en-US)
    [268ms]
    ! Flutter version 3.43.0-0.3.pre on channel [user-branch] at C:\Users\david\develop\flutter
      Currently on an unknown channel. Run `flutter channel` to switch to an official channel.
      If that doesn't fix the issue, reinstall Flutter by following instructions at https://flutter.dev/setup.
    ! Upstream repository unknown source is not a standard remote.
      Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this error.
    • Framework revision 5f58b37fda (8 weeks ago), 2026-02-14 12:12:11 -0500
    • Engine revision 5f58b37fda
    • Dart version 3.12.0 (build 3.12.0-149.0.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
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly
      to perform update checks and upgrades.

[√] Windows Version (Windows 11 or higher, 25H2, 2009) [641ms]

[√] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [1,449ms]
    • Android SDK at C:\Android\Sdk
    • Emulator version unknown
    • Platform android-36, build-tools 35.0.0
    • ANDROID_HOME = C:\Android\Sdk
    • ANDROID_SDK_ROOT = C:\Android\Sdk
    • Java binary at: C:\Program Files\Microsoft\jdk-17.0.18.8-hotspot\bin\java.exe
      This JDK was found in the system PATH.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment Microsoft-13107724 (build 17.0.18+8-LTS)
    • All Android licenses accepted.

[√] Chrome - develop for the web [178ms]
    • CHROME_EXECUTABLE = C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

[√] Visual Studio - develop Windows apps (Visual Studio Community 2026 18.3.0) [177ms]
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\18\Community
    • Visual Studio Community 2026 version 18.3.11505.172
    • Windows 10 SDK version 10.0.26100.0

[√] Connected device (3 available) [261ms]
    • Windows (desktop) • windows • windows-arm64  • Microsoft Windows [Version 10.0.26200.8117]
    • Chrome (web)      • chrome  • web-javascript • unknown
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 146.0.3856.109

[√] Network resources [369ms]
    • All expected network resources are available.

! Doctor found issues in 1 category.
```

</details>


Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

[Windows][ARM64] Touchscreen taps misaligned from widgets (large offset); mouse is correct — regression after 5f58b37fdaa #184954

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Video

Logs

Flutter Doctor output

Metadata

Assignees

Labels

Type

Fields

Projects

Milestone

Relationships

Development

Uh oh!

[Windows][ARM64] Touchscreen taps misaligned from widgets (large offset); mouse is correct — regression after 5f58b37fdaa #184954

Description

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Video

Logs

Flutter Doctor output

Metadata

Metadata

Assignees

Labels

Type

Fields

Projects

Milestone

Relationships

Development

Issue actions