From 39e899294f1c863f33680689d2a2ad1ffaf262fd Mon Sep 17 00:00:00 2001
From: vegeta1k95 <32207817+vegeta1k95@users.noreply.github.com>
Date: Wed, 4 Nov 2020 09:58:20 +0100
Subject: [PATCH] Fix unhandled ValueError inside _dispatch_update() task
 (#1615)

---
 telethon/client/updates.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/telethon/client/updates.py b/telethon/client/updates.py
index 4a9c2d4b..2c2b2836 100644
--- a/telethon/client/updates.py
+++ b/telethon/client/updates.py
@@ -397,6 +397,11 @@ class UpdateMethods:
                     # the channel. Because these "happen sporadically" (#1428)
                     # we should be okay (no flood waits) even if more occur.
                     pass
+                except ValueError:
+                    # There is a chance that GetFullChannelRequest and GetDifferenceRequest
+                    # inside the _get_difference() function will end up with 
+                    # ValueError("Request was unsuccessful N time(s)") for whatever reasons.
+                    pass
 
         if not self._self_input_peer:
             # Some updates require our own ID, so we must make sure