diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index 41827f753..bf291095b 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -628,7 +628,7 @@ chatListArchive = ChatList;
 //@last_read_outbox_message_id Identifier of the last read outgoing message
 //@unread_mention_count Number of unread messages with a mention/reply in the chat
 //@notification_settings Notification settings for this chat
-//@action_bar Describes actions which should be possible to do through a chat action bar
+//@action_bar Describes actions which should be possible to do through a chat action bar; may be null
 //@pinned_message_id Identifier of the pinned message in the chat; 0 if none
 //@reply_markup_message_id Identifier of the message from which reply markup needs to be used; 0 if there is no default custom reply markup in the chat
 //@draft_message A draft of a message in the chat; may be null
diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index 34b6d51b5..8f6693aed 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -7248,6 +7248,11 @@ void ContactsManager::update_user_full(UserFull *user_full, UserId user_id, bool
     td_->messages_manager_->drop_common_dialogs_cache(user_id);
     user_full->is_common_chat_count_changed = false;
   }
+  if (user_full->is_is_blocked_changed) {
+    td_->messages_manager_->on_dialog_is_blocked_updated(DialogId(user_id), user_full->is_blocked);
+    user_full->is_is_blocked_changed = false;
+  }
+
   if (user_full->is_changed) {
     user_full->is_changed = false;
     if (user_full->is_inited) {
@@ -8028,6 +8033,9 @@ void ContactsManager::on_update_user_blocked(UserId user_id, bool is_blocked) {
   }
 
   UserFull *user_full = get_user_full_force(user_id);
+  if (user_full == nullptr || !user_full->is_inited) {
+    td_->messages_manager_->on_dialog_is_blocked_updated(DialogId(user_id), is_blocked);
+  }
   if (user_full == nullptr) {
     return;
   }
@@ -8038,6 +8046,7 @@ void ContactsManager::on_update_user_blocked(UserId user_id, bool is_blocked) {
 void ContactsManager::on_update_user_full_is_blocked(UserFull *user_full, UserId user_id, bool is_blocked) {
   CHECK(user_full != nullptr);
   if (user_full->is_inited && user_full->is_blocked != is_blocked) {
+    user_full->is_is_blocked_changed = true;
     user_full->is_blocked = is_blocked;
     user_full->is_changed = true;
   }
diff --git a/td/telegram/ContactsManager.h b/td/telegram/ContactsManager.h
index 8a2e5b66a..67c5a082d 100644
--- a/td/telegram/ContactsManager.h
+++ b/td/telegram/ContactsManager.h
@@ -580,6 +580,7 @@ class ContactsManager : public Actor {
     bool can_pin_messages = false;
     bool need_phone_number_privacy_exception = false;
 
+    bool is_is_blocked_changed = true;
     bool is_common_chat_count_changed = true;
     bool is_changed = true;
 
diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index f7c8a5bdd..3b646b56e 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -22158,6 +22158,29 @@ void MessagesManager::on_dialog_permissions_updated(DialogId dialog_id) {
   }
 }
 
+void MessagesManager::on_dialog_is_blocked_updated(DialogId dialog_id, bool is_blocked) {
+  CHECK(dialog_id.get_type() == DialogType::User);
+  auto d = get_dialog(dialog_id);  // called from update_user_full, must not create the dialog
+  if (d != nullptr && d->is_update_new_chat_sent) {
+    if (d->know_action_bar) {
+      if (is_blocked) {
+        if (d->can_report_spam || d->can_share_phone_number || d->can_block_user || d->can_add_contact) {
+          d->can_report_spam = false;
+          d->can_share_phone_number = false;
+          d->can_block_user = false;
+          d->can_add_contact = false;
+          // TODO send_update_chat_action_bar(d);
+          on_dialog_updated(dialog_id, "on_dialog_is_blocked_updated 1");
+        }
+      } else {
+        d->know_action_bar = false;
+        // TODO repair_dialog_action_bar(d);
+        on_dialog_updated(dialog_id, "on_dialog_is_blocked_updated 2");
+      }
+    }
+  }
+}
+
 DialogId MessagesManager::resolve_dialog_username(const string &username) const {
   auto cleaned_username = clean_username(username);
   auto it = resolved_usernames_.find(cleaned_username);
diff --git a/td/telegram/MessagesManager.h b/td/telegram/MessagesManager.h
index b926e6558..f9c9e5787 100644
--- a/td/telegram/MessagesManager.h
+++ b/td/telegram/MessagesManager.h
@@ -642,6 +642,7 @@ class MessagesManager : public Actor {
   void on_dialog_title_updated(DialogId dialog_id);
   void on_dialog_username_updated(DialogId dialog_id, const string &old_username, const string &new_username);
   void on_dialog_permissions_updated(DialogId dialog_id);
+  void on_dialog_is_blocked_updated(DialogId dialog_id, bool is_blocked);
 
   void on_resolved_username(const string &username, DialogId dialog_id);
   void drop_username(const string &username);