diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 8c95b318..b68dbe49 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -18247,7 +18247,7 @@ Result<MessagesManager::MessagePushNotificationInfo> MessagesManager::get_messag
   bool have_settings;
   int32 mute_until;
   std::tie(have_settings, mute_until) = get_dialog_mute_until(settings_dialog_id, settings_dialog);
-  if (have_settings && mute_until <= date) {
+  if (have_settings && mute_until > date) {
     return Status::Error("Ignore notification in muted chat");
   }
 
diff --git a/td/telegram/NotificationManager.cpp b/td/telegram/NotificationManager.cpp
index c7d54dfa..179fc226 100644
--- a/td/telegram/NotificationManager.cpp
+++ b/td/telegram/NotificationManager.cpp
@@ -2702,6 +2702,8 @@ Status NotificationManager::process_push_notification_payload(string payload) {
     if (!sender_user_id.is_valid()) {
       return Status::Error("Receive invalid chat_from_id");
     }
+  } else if (dialog_id.get_type() == DialogType::User) {
+    sender_user_id = dialog_id.get_user_id();
   }
 
   TRY_RESULT(contains_mention_int, get_json_object_int_field(custom, "mention"));