[v3] SIGABRT crash: Yoga layout assertion failure when dynamically adding ReanimatedSwipeable rows alongside BottomSheet (Fabric)

Description

Upgrading from react-native-gesture-handler@2.31.2 to 3.0.0 causes a SIGABRT crash on both iOS and Android (Fabric / New Architecture). The crash is a Yoga layout assertion failure triggered during layout of RNGestureHandlerDetectorShadowNode.

The crash occurs when dynamically inserting ReanimatedSwipeable rows into a FlatList while a @gorhom/bottom-sheet (which uses GestureDetector internally) is rendered as a sibling in the same parent view.

This does not occur on react-native-gesture-handler@2.31.2.

Steps to reproduce

1. Clone the repro: https://github.com/AlsaadAhamed4/rngh-v3-crash-repo
2. npm install && cd ios && pod install && cd ..
3. npx react-native run-ios (on a physical device)
4. Tap "Go to Recording Flow"
5. Reproduce via either method:

Method A: Tap "Start Recording" → "Stop" repeatedly. Crash occurs around the 12th record being added.

Method B: Tap "Rapid Add 5 Rows" → "Hide Sheet" → "Show Sheet" → "Rapid Add 5 Rows".

A link to a repository that reproduces the bug

https://github.com/AlsaadAhamed4/rngh-v3-crash-repo

Gesture Handler version

3.0.0

React Native version

0.85.3

Platforms

iOS, Android

JavaScript runtime

Hermes

Workflow

React Native (without Expo)

Architecture

New Architecture (Fabric)

Build type

Debug mode

Device

Real device

Device model

iPhone

Acknowledgements

Yes

Steps to reproduce

1. Run the app on an iOS physical device (Xcode, Debug build)
2. Tap "Go to Recording Flow"
3. Reproduce via either method:

Method A: Tap "Start Recording" → "Stop" repeatedly. Crash occurs around the 12th record being added.

Method B: Tap "Rapid Add 5 Rows" → "Hide Sheet" → "Rapid Add 5 Rows".

A link to a Gist, an Expo Snack or a link to a repository based on this template that reproduces the bug.

https://github.com/AlsaadAhamed4/rngh-v3-crash-repo

Gesture Handler version

3.0.0

React Native version

0.85.3

Platforms

Android, iOS

JavaScript runtime

Hermes

Workflow

React Native (without Expo)

Architecture

New Architecture (Fabric)

Build type

Debug mode

Device

Real device

Device model

iPhone 15 (iOS 26.5)

Acknowledgements

Yes

Start with the linked reproducer repository and compare react-native-gesture-handler 3.0.0 with 2.31.2 under React Native 0.85.3, Fabric, and Hermes. Reproduce the crash through the Recording Flow using both row-insertion methods, then inspect the RNGestureHandlerDetectorShadowNode layout assertion on iOS and Android. Done means both sequences no longer trigger SIGABRT on physical devices.