diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index 4b394eed6..97ad55fdb 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -4516,7 +4516,7 @@ setChatPhoto chat_id:int53 photo:InputChatPhoto = Ok;
 
 //@description Changes the message TTL setting (sets a new self-destruct timer) in a chat. Requires can_delete_messages administrator right in basic groups, supergroups and channels
 //-Message TTL setting of a chat with the current user (Saved Messages) and the chat 777000 (Telegram) can't be changed
-//@chat_id Chat identifier @ttl New TTL value, in seconds; must be one of 0, 86400, 604800 unless chat is secret
+//@chat_id Chat identifier @ttl New TTL value, in seconds; must be one of 0, 86400, 7 * 86400, or 31 * 86400 unless the chat is secret
 setChatMessageTtlSetting chat_id:int53 ttl:int32 = Ok;
 
 //@description Changes the chat members permissions. Supported only for basic groups and supergroups. Requires can_restrict_members administrator right
diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index c9db0b56e..b7dd46518 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -9587,7 +9587,9 @@ void MessagesManager::on_get_history(DialogId dialog_id, MessageId from_message_
         }
       }
 
-      have_next = true;
+      if (!message_ids.empty()) {
+        have_next = true;
+      }
     }
   }
 
diff --git a/td/telegram/UpdatesManager.cpp b/td/telegram/UpdatesManager.cpp
index f17446c85..d644048de 100644
--- a/td/telegram/UpdatesManager.cpp
+++ b/td/telegram/UpdatesManager.cpp
@@ -165,7 +165,7 @@ class GetDifferenceQuery final : public Td::ResultHandler {
   }
 };
 
-const double UpdatesManager::MAX_UNFILLED_GAP_TIME = 0.4;
+const double UpdatesManager::MAX_UNFILLED_GAP_TIME = 0.7;
 
 UpdatesManager::UpdatesManager(Td *td, ActorShared<> parent) : td_(td), parent_(std::move(parent)) {
   pts_manager_.init(-1);