diff --git a/telethon/_client/updates.py b/telethon/_client/updates.py
index 23d9ee27..5240e2f6 100644
--- a/telethon/_client/updates.py
+++ b/telethon/_client/updates.py
@@ -201,7 +201,11 @@ async def _update_loop(self: 'TelegramClient'):
                 continue
 
             processed = []
-            users, chats = self._message_box.process_updates(updates, self._entity_cache, processed)
+            try:
+                users, chats = self._message_box.process_updates(updates, self._entity_cache, processed)
+            except GapError:
+                continue  # get(_channel)_difference will start returning requests
+
             updates_to_dispatch.extend(_preprocess_updates(self, processed, users, chats))
     except Exception:
         self._log[__name__].exception('Fatal error handling updates (this is a bug in Telethon, please report it)')