diff --git a/app/lib/bloc/list_importable_album.dart b/app/lib/bloc/list_importable_album.dart
index b44cac46..e36b882b 100644
--- a/app/lib/bloc/list_importable_album.dart
+++ b/app/lib/bloc/list_importable_album.dart
@@ -131,7 +131,7 @@ class ListImportableAlbumBloc
             products.add(ev);
             // don't emit events too frequently
             if (++count >= 5) {
-              emit(ListImportableAlbumBlocLoading(products));
+              emit(ListImportableAlbumBlocLoading(products.toList()));
             }
           }
         }
diff --git a/app/lib/bloc/scan_account_dir.dart b/app/lib/bloc/scan_account_dir.dart
index f0b7b8c9..48e7c9f5 100644
--- a/app/lib/bloc/scan_account_dir.dart
+++ b/app/lib/bloc/scan_account_dir.dart
@@ -386,7 +386,7 @@ class ScanAccountDirBloc
         files.addAll(event);
         if (cache.isEmpty) {
           // only emit partial results if there's no cache
-          emit(ScanAccountDirBlocLoading(files));
+          emit(ScanAccountDirBlocLoading(files.toList()));
         }
       }
       _log.info(
diff --git a/app/lib/bloc/scan_local_dir.dart b/app/lib/bloc/scan_local_dir.dart
index 8d092b22..eb6b83df 100644
--- a/app/lib/bloc/scan_local_dir.dart
+++ b/app/lib/bloc/scan_local_dir.dart
@@ -93,7 +93,7 @@ class ScanLocalDirBloc
       final products = <LocalFile>[];
       for (final p in event.relativePaths) {
         if (shouldEmitIntermediate) {
-          emit(ScanLocalDirBlocLoading(products));
+          emit(ScanLocalDirBlocLoading(products.toList()));
         }
         final files = await ScanLocalDir(c)(p);
         products.addAll(files);