diff --git a/shell/browser/api/electron_api_app.cc b/shell/browser/api/electron_api_app.cc
index b633af1b1ab81..fe8b3cc1a9588 100644
--- a/shell/browser/api/electron_api_app.cc
+++ b/shell/browser/api/electron_api_app.cc
@@ -526,7 +526,7 @@ bool NotificationCallbackWrapper(
     const ProcessSingleton::NotificationAckCallback& ack_callback) {
   // Make sure the callback is called after app gets ready.
   if (Browser::Get()->is_ready()) {
-    callback.Run(cmd, cwd, additional_data, ack_callback);
+    callback.Run(cmd, cwd, std::move(additional_data), ack_callback);
   } else {
     scoped_refptr<base::SingleThreadTaskRunner> task_runner(
         base::ThreadTaskRunnerHandle::Get());
@@ -1084,9 +1084,14 @@ void App::OnFirstInstanceAck(
   v8::Isolate* isolate = JavascriptEnvironment::GetIsolate();
   v8::Locker locker(isolate);
   v8::HandleScope handle_scope(isolate);
-  v8::Local<v8::Value> data_to_send;
+  base::Value data_to_send;
   if (first_instance_data) {
-    data_to_send = DeserializeV8Value(isolate, *first_instance_data);
+    // Don't send back the local directly, because it might be empty
+    v8::Local<v8::Value> data_local;
+    data_local = DeserializeV8Value(isolate, *first_instance_data);
+    if (!data_local.IsEmpty()) {
+      gin::ConvertFromV8(isolate, data_local, &data_to_send);
+    }
   }
   Emit("first-instance-ack", data_to_send);
 }