Try to reproduce

CHANGELOG.md

@@ -1,3 +1,17 @@
+## vNext (TBD)
+
+### Enhancements
+* None
+
+### Fixed
+* None
+
+### Compatibility
+* Realm Studio: 15.0.0 or later.
+
+### Internal
+* Using Core x.y.z.
+
 ## 3.0.0 (2024-06-07)
 
 ### Breaking Changes

packages/realm_dart/test/app_test.dart

@@ -8,6 +8,7 @@ import 'package:crypto/crypto.dart';
 import 'package:http/http.dart';
 import 'package:path/path.dart' as path;
 import 'package:realm_dart/realm.dart';
+import 'package:realm_dart/src/configuration.dart';
 import 'package:realm_dart/src/handles/realm_core.dart';
 
 import 'test.dart';
@@ -379,6 +380,21 @@ void main() {
     expect(log, contains('App constructor called on Isolate'));
   });
 
+  baasTest('boom', (appConfig) async {
+    final appId = appConfig.appId;
+    final url = appConfig.baseUrl;
+    for (var i = 0; i < 5; i++) {
+      await Isolate.run(() async {
+        clearCachedApps(); // simulate first time on main isolate
+        final app = App(AppConfiguration(appId, baseUrl: url));
+        final user = await app.logIn(Credentials.anonymous());
+        final config = Configuration.flexibleSync(user, getSyncSchema());
+        final realm = getRealm(config, stopPolicy: SessionStopPolicy.afterChangesUploaded);
+        realm.close();
+      });
+    }
+  });
+
   test('AppConfiguration(empty-id) throws', () {
     expect(() => AppConfiguration(''), throwsA(isA<RealmException>()));
   });

packages/realm_dart/test/test.dart

@@ -485,9 +485,9 @@ String generateRandomEmail({int length = 5}) {
   return "[email protected]";
 }
 
-Realm getRealm(Configuration config) {
+Realm getRealm(Configuration config, {SessionStopPolicy stopPolicy = SessionStopPolicy.immediately}) {
   if (config is FlexibleSyncConfiguration) {
-    config.sessionStopPolicy = SessionStopPolicy.immediately;
+    config.sessionStopPolicy = stopPolicy;
   }
 
   final realm = Realm(config);