diff --git a/src/pymax/interfaces.py b/src/pymax/interfaces.py
index abe8ed7..b91cb7a 100644
--- a/src/pymax/interfaces.py
+++ b/src/pymax/interfaces.py
@@ -287,12 +287,12 @@ async def _handle_file_upload(self, data: dict[str, Any]) -> None:
                     self.logger.debug("Fulfilled file upload waiter for %s=%s", key, id_)
 
     async def _send_notification_response(self, chat_id: int, message_id: str) -> None:
-        if self._socket is not None and self.is_connected:
+        if self._socket is None or not self.is_connected:
             return
-        await self._send_and_wait(
+        await self._queue_message(
             opcode=Opcode.NOTIF_MESSAGE,
             payload={"chatId": chat_id, "messageId": message_id},
-            cmd=0,
+            cmd=1,
         )
         self.logger.debug(
             "Sent NOTIF_MESSAGE_RECEIVED for chat_id=%s message_id=%s", chat_id, message_id
diff --git a/src/pymax/static/constant.py b/src/pymax/static/constant.py
index 77db333..6feed26 100644
--- a/src/pymax/static/constant.py
+++ b/src/pymax/static/constant.py
@@ -77,7 +77,7 @@
 DEFAULT_DEVICE_LOCALE: Final[str] = "ru"
 DEFAULT_DEVICE_NAME: Final[str] = choice(DEVICE_NAMES)
 DEFAULT_APP_VERSION: Final[str] = "25.12.14"
-DEFAULT_SCREEN: Final[str] = "1080x1920 1.0x"
+DEFAULT_SCREEN: Final[str] = choice(SCREEN_SIZES)
 DEFAULT_OS_VERSION: Final[str] = choice(OS_VERSIONS)
 DEFAULT_USER_AGENT: Final[str] = ua_generator.generate().text
 DEFAULT_BUILD_NUMBER: Final[int] = 0x97CB