diff --git a/lib/pods/file_pool.dart b/lib/pods/file_pool.dart
index 891f414d..84cb111e 100644
--- a/lib/pods/file_pool.dart
+++ b/lib/pods/file_pool.dart
@@ -6,7 +6,10 @@ import 'package:island/pods/network.dart';
 final poolsProvider = FutureProvider<List<SnFilePool>>((ref) async {
   final dio = ref.watch(apiClientProvider);
   final response = await dio.get('/drive/pools');
-  return response.data.map((e) => SnFilePool.fromJson(e)).toList();
+  return response.data
+      .map((e) => SnFilePool.fromJson(e))
+      .cast<SnFilePool>()
+      .toList();
 });
 
 String? resolveDefaultPoolId(WidgetRef ref, List<SnFilePool> pools) {
diff --git a/lib/widgets/chat/message_item.dart b/lib/widgets/chat/message_item.dart
index c9be4cfd..56ed202b 100644
--- a/lib/widgets/chat/message_item.dart
+++ b/lib/widgets/chat/message_item.dart
@@ -130,7 +130,7 @@ class MessageItem extends HookConsumerWidget {
 
     useEffect(() {
       if (flashing) {
-        if (flashTimer.value != null) return null;
+        flashTimer.value?.cancel();
         isFlashing.value = true;
         flashTimer.value = Timer.periodic(
           const Duration(milliseconds: kFlashDuration),