Bug that occurred after version upgrade

[ismail-go]

Hi,
I was using rive: ^0.13.20 version to play my splash.riv animation. It was playing properly without any problem. But after the upgrading from rive: ^0.13.20 to rive: ^0.14.0-dev.4 my animation behavior is broke down.

it now shows a jittery scaling behavior, like it’s growing and shrinking (a slipping/stretching effect).

There is same bug on both platforms ios and android.
I am sharing the animation file to reproduce in this link https://drive.google.com/file/d/1U6d7FrWNbEe9dpQXyPjuKJQH0XPQ5lT2/view?usp=sharing

viewModel.isAnimationInitialized
                  ? RiveWidget(
                    controller: viewModel.animationController,
                    fit: Fit.contain,
                  )
                  : SizedBox.shrink();



  late File animationFile;
  late RiveWidgetController animationController;

  @observable
  bool isAnimationInitialized = false;

  void initRive() async {
    animationFile = (await File.asset(
      Assets.animation.splash,
      // Choose which renderer to use
      riveFactory: Factory.flutter,
    ))!;
    animationController = RiveWidgetController(animationFile);
    isAnimationInitialized = true;
  }

Device & Versions

• Device: iphone 13 pro
• OS: ios 17.4

[✓] Flutter (Channel stable, 3.32.7, on macOS 15.0.1 24A348 darwin-arm64, locale en-TR) [545ms]
    • Flutter version 3.32.7 on channel stable at /Users/ismail/Flutter/Sdk/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision d7b523b356 (2 weeks ago), 2025-07-15 17:03:46 -0700
    • Engine revision 39d6d6e699
    • Dart version 3.8.1
    • DevTools version 2.45.1

[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [2.5s]
    • Android SDK at /Users/ismail/Library/Android/sdk
    • Platform android-35, build-tools 35.0.0
    • Java binary at: /Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home/bin/java
      This JDK is specified in your Flutter configuration.
      To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment Temurin-17.0.13+11 (build 17.0.13+11)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.1) [1,054ms]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16B40
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web [11ms]
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.2) [10ms]
    • Android Studio at /Users/ismail/Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.3+-79915917-b509.11)

[✓] Connected device (2 available) [10.3s]
    • *SM S918B (mobile)                 • R5CX12ZJEKY               • android-arm64  • Android 15 (API 35)*
    • *iPhone 13 Pro - Ofis (mobile)     • 00008110-001A28C12188401E • ios            • iOS 17.7 21H16*

[✓] Network resources [1,320ms]
    • All expected network resources are available.

[HayesGordon]

Hi @ismail-go, it might be because you're also animating the artboard size? Is this functionality that you relied on with the older runtime? Could you share a before and after video that demonstrates what you're seeing