diff --git a/td/telegram/TopDialogManager.cpp b/td/telegram/TopDialogManager.cpp
index 8fa9d5b8..f84496e9 100644
--- a/td/telegram/TopDialogManager.cpp
+++ b/td/telegram/TopDialogManager.cpp
@@ -524,7 +524,7 @@ void TopDialogManager::init() {
 
 void TopDialogManager::on_first_sync() {
   was_first_sync_ = true;
-  if (G()->td().get_actor_unsafe()->auth_manager_->is_bot()) {
+  if (!G()->close_flag() && G()->td().get_actor_unsafe()->auth_manager_->is_bot()) {
     is_active_ = false;
     init();
   }
diff --git a/tdactor/td/actor/MultiPromise.cpp b/tdactor/td/actor/MultiPromise.cpp
index 3335cd3f..7a2719b5 100644
--- a/tdactor/td/actor/MultiPromise.cpp
+++ b/tdactor/td/actor/MultiPromise.cpp
@@ -13,6 +13,9 @@ void MultiPromiseActor::add_promise(Promise<Unit> &&promise) {
 }
 
 Promise<Unit> MultiPromiseActor::get_promise() {
+  if (empty()) {
+    register_actor(name_, this).release();
+  }
   CHECK(!promises_.empty());
 
   PromiseActor<Unit> promise;
diff --git a/tdactor/td/actor/MultiPromise.h b/tdactor/td/actor/MultiPromise.h
index c7380382..a1d4a1c4 100644
--- a/tdactor/td/actor/MultiPromise.h
+++ b/tdactor/td/actor/MultiPromise.h
@@ -60,8 +60,7 @@ class MultiPromiseActor final
     : public Actor
     , public MultiPromiseInterface {
  public:
-  MultiPromiseActor(Slice name) {
-    register_actor(name, this).release();
+  explicit MultiPromiseActor(string name) : name_(std::move(name)) {
   }
 
   void add_promise(Promise<Unit> &&promise) override;
@@ -75,6 +74,7 @@ class MultiPromiseActor final
  private:
   void set_result(Result<Unit> &&result);
 
+  string name_;
   vector<Promise<Unit>> promises_;     // promises waiting for result
   vector<FutureActor<Unit>> futures_;  // futures waiting for result of the queries
   size_t received_results_ = 0;
@@ -96,7 +96,7 @@ class MultiPromiseActorSafe : public MultiPromiseInterface {
   Promise<Unit> get_promise() override;
   void set_ignore_errors(bool ignore_errors) override;
   size_t promise_count() const override;
-  explicit MultiPromiseActorSafe(Slice name) : multi_promise_(make_unique<MultiPromiseActor>(name)) {
+  explicit MultiPromiseActorSafe(string name) : multi_promise_(td::make_unique<MultiPromiseActor>(std::move(name))) {
   }
   MultiPromiseActorSafe(const MultiPromiseActorSafe &other) = delete;
   MultiPromiseActorSafe &operator=(const MultiPromiseActorSafe &other) = delete;
diff --git a/tdutils/td/utils/tl_storers.h b/tdutils/td/utils/tl_storers.h
index 5a0147c6..1411b40c 100644
--- a/tdutils/td/utils/tl_storers.h
+++ b/tdutils/td/utils/tl_storers.h
@@ -227,7 +227,7 @@ class TlStorerToString {
       int b = value[static_cast<int>(i)] & 0xff;
       result += hex[b >> 4];
       result += hex[b & 15];
-      if (i != len) {
+      if (i + 1 != len) {
         result += ' ';
       }
     }