diff --git a/telethon/network/mtprotosender.py b/telethon/network/mtprotosender.py
index 0d40e6b6..d821a023 100644
--- a/telethon/network/mtprotosender.py
+++ b/telethon/network/mtprotosender.py
@@ -304,6 +304,9 @@ class MTProtoSender:
         for retry in range(1, retries + 1):
             try:
                 await self._connect()
+                for m in self._pending_messages.values():
+                    self._send_queue.put_nowait(m)
+
                 break
             except ConnectionError:
                 __log__.info('Failed reconnection retry %d/%d', retry, retries)