[Android] App crashes on hot reload with New Architecture (Fabric + Bridgeless)

[kimchi-developer]

Description

App crashes with SIGABRT when pressing r for hot reload in development mode on Android with New Architecture enabled.

What happened

When hot reloading, the app crashes immediately with a JNI null pointer error.

What I expected

Hot reload should work without crashing.

Environment

• react-native: 0.83.0-rc.3 / 0.83.0-rc.5
• react-native-screens: 4.19.0-nightly-20251203
• Architecture: New Architecture (Fabric + Bridgeless)
• Platform: Android

Reproduction

1. Create any app with @react-navigation/native-stack
2. Enable New Architecture on Android
3. Run the app in development mode
4. Press r to hot reload
5. App crashes

Crash Log

F libc: Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE)
JNI DETECTED ERROR IN APPLICATION: field operation on NULL object: 0x0
  in call to GetObjectField
  from void com.facebook.jni.HybridData$Destructor.deleteNative(long)

Stack Trace

#16 facebook::react::JFabricUIManager::getBinding()
#17 facebook::react::RNSScreenShadowNodeCommitHook::getUIManagerFromSharedContext
#18 facebook::react::RNSScreenShadowNodeCommitHook::~RNSScreenShadowNodeCommitHook

Root Cause

The bug was introduced in PR #3295 (commit 91b17d5).

The RNSScreenShadowNodeCommitHook destructor tries to call getUIManagerFromSharedContext() to unregister itself, but during hot reload, FabricUIManagerBinding is already destroyed, causing a null pointer access.

Suggested Fix

Don't unregister in the destructor since UIManager cleans up hooks automatically when destroyed.

I have a PR ready: #3475

[github-actions]

Hey! 👋

It looks like you've omitted a few important sections from the issue template.

Please complete Steps to reproduce, Snack or a link to a repository, Screens version, React Native version and Platforms sections.

[github-actions]

Hey! 👋

The issue doesn't seem to contain a minimal reproduction.

Could you provide a snack or a link to a GitHub repository under your username that reproduces the problem?

[kkafar]

Hey! Thanks for the report and the PR!

[kkafar]

I confirm the issue