[iOS] Incorrect behaviour of text cursor with 3D Touch

[sakyoyuto]

Text cursor movement of iOS space key 3D Touch(Long press) does not work in Japanese keyboard.
Works in English keyboard.
It used to work, but it may have been a problem since iOS13.

Below is my doctor.

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.12.13+hotfix.5, on Mac OS X 10.15.1 19B88,
    locale ja-JP)
[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from:
      https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK
      components.
      (or visit https://flutter.dev/setup/#android-setup for detailed
      instructions).
      If the Android SDK has been installed to a custom location, set
      ANDROID_HOME to that location.
      You may also want to add it to your PATH environment variable.

[✓] Xcode - develop for iOS and macOS (Xcode 11.2.1)
[!] Android Studio (not installed)
[✓] VS Code (version 1.41.1)
[!] Connected device
    ! No devices available

Thank you.

[sakyoyuto]

@iapicca @shihaohong @goderbauer
I need help. Is there solution?

[shihaohong]

cc/ @justinmc @GaryQian who might know more than I do about text editing and the keyboard

[justinmc]

It seems to work for me on an iPhone 7 on iOS 13 with the default iOS Kana keyboard. I'm on the master channel. Are you doing anything different?

[sakyoyuto]

@justinmc
Thank you for your reply.

Apparently, such symptoms occur when Japanese is entered.
Attach the video.

I switched to the master channel and the same problem occurs.
Below is my doctor.

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v1.14.7-pre.83, on Mac OS X 10.15.2 19C57, locale
    ja-JP)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 11.2.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 3.5)
[✓] VS Code (version 1.41.1)
[✓] Connected device (2 available)

• No issues found!

Thank you.

[justinmc]

I tried again and I do see some weird movement of the cursor, but I don't see the stuck cursor like in your video. Do you get an error in the console when that happens?

[sakyoyuto]

No errors are displayed on the console.

Cursor hovering and seems to freeze if you release the space key immediately. (Within 1 second)
If you keep pressing the space key, it starts to make weird movements.

Thank you.

[justinmc]

Ok got it. I do see those same sorts of freezing cursor movements. I think that's a bug we should fix.

[sakyoyuto]

Thank you.

[LoongZhi]

Ok got it. I do see those same sorts of freezing cursor movements. I think that's a bug we should fix.

Is there a solution？

[kongo2002]

I don't think this is any specific to Japanese at all. For me this happens with a regular English keyboard as well. I think it happens every time you don't actually move the cursor after long-pressing.

I posted this earlier to a very similar issue since I saw that one before (including a screen recording): #54413 (comment)

[VladyslavBondarenko]

Screen recording from #54413 (comment), thanks @kongo2002.

I can reproduce the same. It's not specific to the language.

flutter doctor -v

[✓] Flutter (Channel dev, v1.18.0-6.0.pre, on Mac OS X 10.15.4 19E287, locale en-GB)
    • Flutter version 1.18.0-6.0.pre at /Users/nevercode/dev/flutter_dev
    • Framework revision 84c84fb249 (2 days ago), 2020-04-20 21:35:01 -0400
    • Engine revision 2bde4f0ae4
    • Dart version 2.9.0 (build 2.9.0-1.0.dev a12c36dd97)

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /Users/nevercode/Library/Android/sdk
    • Platform android-29, build-tools 29.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.4.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.4.1, Build version 11E503a
    • CocoaPods version 1.9.0

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 3.6)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 45.1.1
    • Dart plugin version 192.7761
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] VS Code (version 1.44.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.9.1

[✓] Connected device (5 available)
    • Android SDK built for x86 • emulator-5554                            • android-x86    • Android 10 (API 29) (emulator)
    • Nevercode’s iPhone        • b668e524315069f3db3661ac11ff1f66afafebdb • ios            • iOS 13.4.5
    • macOS                     • macOS                                    • darwin-x64     • Mac OS X 10.15.4 19E287
    • Chrome                    • chrome                                   • web-javascript • Google Chrome 81.0.4044.122
    • Web Server                • web-server                               • web-javascript • Flutter Tools

• No issues found!

[suztomo]

I noticed this cursor move bug behavior does not appear in release builds (good).

[kongo2002]

@suztomo are you sure about that? I originally noticed that bug on a release build, that's why it surprises me a lot.

[suztomo]

Now I’m not sure. My release build also shows the cursor bug today.

[github-actions]

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