fix channelpreview with messagelistempty

example/ios/Flutter/.last_build_id

@@ -1 +1 @@
-13a41b8138c4868054e44b5158f3bdd6
+c770358a10272b4ee1cdc2eb432445f6

example/lib/main.dart

@@ -127,7 +127,7 @@ class ChannelListPage extends StatelessWidget {
               '\$in': [StreamChat.of(context).user.id],
             }
           },
-          sort: [SortOption('last_message_at')],
+          // sort: [SortOption('last_message_at')],
           pagination: PaginationParams(
             limit: 20,
           ),

lib/src/channel_preview.dart

@@ -128,7 +128,10 @@ class ChannelPreview extends StatelessWidget {
       stream: channel.state.messagesStream,
       initialData: channel.state.messages,
       builder: (context, snapshot) {
-        final lastMessage = snapshot.data?.lastWhere((m) => m.shadowed != true);
+        final lastMessage = snapshot.data?.lastWhere(
+          (m) => m.shadowed != true,
+          orElse: () => null,
+        );
         if (lastMessage == null) {
           return SizedBox();
         }