JSON Parse error: Unexpected end of input at parse (native)

Description

com.facebook.jni.CppException: JSON Parse error: Unexpected end of input

SyntaxError: JSON Parse error: Unexpected end of input
    at parse (native)
    at com.swmansion.reanimated.nativeProxy.EventHandler.receiveEvent(EventHandler.java)
    at com.swmansion.reanimated.nativeProxy.EventHandler.receiveEvent(EventHandler.java:25)
    at com.facebook.react.uimanager.events.Event.dispatch(Event.java:173)
    at com.swmansion.reanimated.NodesManager.handleEvent(NodesManager.java:367)
    at com.swmansion.reanimated.NodesManager.onEventDispatch(NodesManager.java:353)
    at com.facebook.react.uimanager.events.EventDispatcherImpl.dispatchEvent(EventDispatcherImpl.java:118)
    at com.facebook.react.views.textinput.ReactEditTextInputConnectionWrapper.dispatchKeyEvent(ReactEditTextInputConnectionWrapper.java:158)
    at com.facebook.react.views.textinput.ReactEditTextInputConnectionWrapper.endBatchEdit(ReactEditTextInputConnectionWrapper.java:81)
    at com.android.internal.inputmethod.RemoteInputConnectionImpl.lambda$endBatchEdit$34$com-android-internal-inputmethod-RemoteInputConnectionImpl(RemoteInputConnectionImpl.java:904)
    at com.android.internal.inputmethod.RemoteInputConnectionImpl$$ExternalSyntheticLambda31.run
    at android.os.Handler.handleCallback(Handler.java:942)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loopOnce(Looper.java:226)
    at android.os.Looper.loop(Looper.java:313)
    at android.app.ActivityThread.main(ActivityThread.java:8762)
    at java.lang.reflect.Method.invoke(Method.java)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:604)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)

Steps to reproduce

​I haven't been able to reproduce the issue myself, but we've received user reports indicating that the error occurs when using the Simeji keyboard app. According to the users, the app crashes when they repeatedly press the Enter or arrow keys while the keyboard is set to Roman character input mode.​

We're seeing approximately 1.8K error events per day reported through Sentry, and similar reports are also appearing in the Google Play Console.

Snack or a link to a repository

none

Reanimated version

3.17.2

React Native version

0.78.2

Platforms

Android

JavaScript runtime

Hermes

Workflow

React Native

Architecture

Paper (Old Architecture)

Build type

Release app & production bundle

Device

Real device

Device model

No response

Acknowledgements

Yes

Start by tracing EventHandler.receiveEvent and NodesManager.handleEvent/onEventDispatch in the stack trace, then investigate the Simeji keyboard's repeated Enter or arrow-key events on Android. A useful outcome requires identifying the malformed event data and establishing a reproducible case or regression coverage for the reported JSON parse failure.