Background write action is not permitted on this thread. Consider using `backgroundWriteAction`, or switch to EDT

[Gridzzle]

Everything was fine for the last 2 months, except for today:
Every time I open Claude's code in the project terminal, I can only send one prompt, then I'm unable to type again: "Text input frozen."
And when I restart the IDE, I get this error :

Please file this bug report at https://github.com/flutter/flutter-intellij/issues/new.

---

What happened

(please describe what you were doing when this exception occurred)

Version information

IntelliJ IDEA 2025.3.2 • Flutter plugin io.flutter 89.0.0 • Dart plugin 502.0.0

Flutter 3.38.7 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 3b62efc2a3 (10 days ago) • 2026-01-13 13:47:42 -0800
Engine • hash 6f3039bf7c3cb5306513c75092822d4d94716003 (revision 78fc3012e4) (16 days ago) • 2026-01-07 18:42:12.000Z
Tools • Dart 3.10.7 • DevTools 2.51.1

Exception

null

java.lang.IllegalStateException: Background write action is not permitted on this thread. Consider using `backgroundWriteAction`, or switch to EDT
	at com.intellij.openapi.application.impl.ApplicationImpl.checkWriteActionAllowedOnCurrentThread(ApplicationImpl.java:1120)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1127)
	at io.flutter.utils.OpenApiUtils.safeRunWriteAction(OpenApiUtils.java:94)
	at io.flutter.FlutterInitializer.ensureAndroidSdk(FlutterInitializer.java:443)
	at io.flutter.FlutterInitializer.executeProjectStartup(FlutterInitializer.java:122)
	at io.flutter.FlutterProjectActivity.execute$suspendImpl(FlutterProjectActivity.kt:21)
	at io.flutter.FlutterProjectActivity.execute(FlutterProjectActivity.kt)
	at com.intellij.ide.startup.impl.StartupManagerImplKt$launchActivity$1.invokeSuspend(StartupManagerImpl.kt:511)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:610)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runDefaultDispatcherTask(CoroutineScheduler.kt:1194)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:906)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:775)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:762)

Flutter log

2026-01-24 11:41:05 io.flutter.FlutterInitializer [INFO   ] Executing Flutter plugin startup for project: ahmed_chat_app  
2026-01-24 11:41:05 io.flutter.sdk.FlutterCommand [INFO   ] flutter [--no-color, config, --machine]  
2026-01-24 11:41:05 io.flutter.FlutterInitializer [INFO   ] Flutter module has been found for project: ahmed_chat_app  
2026-01-24 11:41:05 io.flutter.FlutterInitializer [SEVERE ] Background write action is not permitted on this thread. Consider using `backgroundWriteAction`, or switch to EDT 
java.lang.IllegalStateException: Background write action is not permitted on this thread. Consider using `backgroundWriteAction`, or switch to EDT
	at com.intellij.openapi.application.impl.ApplicationImpl.checkWriteActionAllowedOnCurrentThread(ApplicationImpl.java:1120)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1127)
	at io.flutter.utils.OpenApiUtils.safeRunWriteAction(OpenApiUtils.java:94)
	at io.flutter.FlutterInitializer.ensureAndroidSdk(FlutterInitializer.java:443)
	at io.flutter.FlutterInitializer.executeProjectStartup(FlutterInitializer.java:122)
	at io.flutter.FlutterProjectActivity.execute$suspendImpl(FlutterProjectActivity.kt:21)
	at io.flutter.FlutterProjectActivity.execute(FlutterProjectActivity.kt)
	at com.intellij.ide.startup.impl.StartupManagerImplKt$launchActivity$1.invokeSuspend(StartupManagerImpl.kt:511)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:610)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runDefaultDispatcherTask(CoroutineScheduler.kt:1194)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:906)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:775)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:762)
 
2026-01-24 11:41:05 io.flutter.FlutterInitializer [SEVERE ] IntelliJ IDEA 2025.3.2  Build #IU-253.30387.90  
2026-01-24 11:41:05 io.flutter.FlutterInitializer [SEVERE ] JDK: 21.0.9; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o.  
2026-01-24 11:41:05 io.flutter.FlutterInitializer [SEVERE ] OS: Mac OS X  
2026-01-24 11:41:05 io.flutter.FlutterInitializer [SEVERE ] Plugin to blame: Flutter version: 89.0.0  
2026-01-24 11:41:05 io.flutter.FlutterInitializer [SEVERE ] Last Action:   
2026-01-24 11:41:06 io.flutter.run.daemon.DeviceDaemon [INFO   ] starting Flutter device daemon #1: flutter daemon  
2026-01-24 11:41:06 io.flutter.sdk.FlutterCommand [INFO   ] flutter [--no-color, config, --machine]  
2026-01-24 11:41:07 io.flutter.sdk.FlutterSdk [INFO   ] flutter config --machine (2583ms)  
2026-01-24 11:41:08 io.flutter.sdk.FlutterSdk [INFO   ] flutter config --machine (1899ms)  
2026-01-24 11:41:08 io.flutter.run.daemon.DeviceDaemon [INFO   ] flutter device daemon #1: Waiting for another flutter command to release the startup lock...  
2026-01-24 11:41:08 io.flutter.run.daemon.DeviceDaemon [INFO   ] flutter device daemon #1: Device daemon started.  

[pq]

See also: #8655