Inconsistent end-of-animation callback between iOS (`onPause`) and Android (`onStop`)

Description

On React Native + Expo, the end-of-animation callback is inconsistent across platforms.

• On iOS, the animation “end” can only be detected via onPause.
• On Android, it fires via onStop.

This forces platform-specific handling when all I need is a single “animation finished” signal.

Provide a Repro

Minimal example (Expo, React Native 0.81):

import { StyleSheet, View } from 'react-native';
import { router } from 'expo-router';
import * as SplashScreen from 'expo-splash-screen';
import Rive from 'rive-react-native';

import { STORAGE } from '@/core/config/constants';
import { storage } from '@/core/lib/react-native-mmkv';
import '@/core/lib/tailwind.css';

SplashScreen.preventAutoHideAsync();
SplashScreen.setOptions({ fade: true });

export default function RootScreen() {
  const onLayout = async () => {
    await SplashScreen.hideAsync();
  };

  const onContinue = () => {
    const completed = !!storage.getBoolean(STORAGE.ONBOARDING.COMPLETED);
    router.replace(completed ? '/(tabs)/home' : '/onboarding');
  };

  return (
    <View style={styles.container} onLayout={onLayout}>
      <Rive
        resourceName="splash"
        style={styles.animation}
        // iOS seems to signal end via onPause
        onPause={onContinue}
        // Android seems to signal end via onStop
        onStop={onContinue}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  container: { flex: 1, alignItems: 'center', backgroundColor: '#E4002B' },
  animation: { width: '100%' },
});

Observed behavior:

• iOS triggers onPause when animation finishes; onStop does not fire.
• Android triggers onStop when animation finishes; onPause does not fire.

Workaround:

Register both onPause and onStop and call the same handler.

Source .riv/.rev file

splash.riv.zip

Expected behavior

A single, cross-platform callback (e.g., onStop or a dedicated onEnd) should consistently fire when the animation finishes, so platform conditionals aren’t required.

Device & Versions (please complete the following information)

• Device: iPhone 13 Pro (physical), Google Pixel 9 (emulator).
• OS: TBD (e.g., iOS 18.x, Android API level XX)
• NPM Version: 10.9.2

Start with the provided Expo and React Native 0.81 reproduction using the Rive component, then compare onPause and onStop on the iPhone 13 Pro and Pixel 9. Done means one animation-completion callback fires consistently on both iOS and Android without platform-specific handlers.