diff --git a/pyrogram/api/core/primitives/string.py b/pyrogram/api/core/primitives/string.py
index 5c05e5b0..3584d1b9 100644
--- a/pyrogram/api/core/primitives/string.py
+++ b/pyrogram/api/core/primitives/string.py
@@ -24,7 +24,7 @@ from . import Bytes
 class String(Bytes):
     @staticmethod
     def read(b: BytesIO, *args) -> str:
-        return super(String, String).read(b).decode()
+        return super(String, String).read(b).decode(errors="replace")
 
     def __new__(cls, value: str) -> bytes:
         return super().__new__(cls, value.encode())
diff --git a/pyrogram/client/client.py b/pyrogram/client/client.py
index a3cbd93b..97002e79 100644
--- a/pyrogram/client/client.py
+++ b/pyrogram/client/client.py
@@ -218,28 +218,33 @@ class Client(Methods, BaseClient):
         self.session.start()
         self.is_started = True
 
-        if self.user_id is None:
+        try:
+            if self.user_id is None:
+                if self.bot_token is None:
+                    self.authorize_user()
+                else:
+                    self.authorize_bot()
+
+                self.save_session()
+
             if self.bot_token is None:
-                self.authorize_user()
+                now = time.time()
+
+                if abs(now - self.date) > Client.OFFLINE_SLEEP:
+                    self.peers_by_username = {}
+                    self.peers_by_phone = {}
+
+                    self.get_initial_dialogs()
+                    self.get_contacts()
+                else:
+                    self.send(functions.messages.GetPinnedDialogs())
+                    self.get_initial_dialogs_chunk()
             else:
-                self.authorize_bot()
-
-            self.save_session()
-
-        if self.bot_token is None:
-            now = time.time()
-
-            if abs(now - self.date) > Client.OFFLINE_SLEEP:
-                self.peers_by_username = {}
-                self.peers_by_phone = {}
-
-                self.get_initial_dialogs()
-                self.get_contacts()
-            else:
-                self.send(functions.messages.GetPinnedDialogs())
-                self.get_initial_dialogs_chunk()
-        else:
-            self.send(functions.updates.GetState())
+                self.send(functions.updates.GetState())
+        except Exception as e:
+            self.is_started = False
+            self.session.stop()
+            raise e
 
         for i in range(self.UPDATES_WORKERS):
             self.updates_workers_list.append(
diff --git a/pyrogram/client/methods/messages/send_audio.py b/pyrogram/client/methods/messages/send_audio.py
index f31ffa21..3bb23afb 100644
--- a/pyrogram/client/methods/messages/send_audio.py
+++ b/pyrogram/client/methods/messages/send_audio.py
@@ -35,6 +35,7 @@ class SendAudio(BaseClient):
                    duration: int = 0,
                    performer: str = None,
                    title: str = None,
+                   thumb: str = None,
                    disable_notification: bool = None,
                    reply_to_message_id: int = None,
                    reply_markup=None,
@@ -73,6 +74,12 @@ class SendAudio(BaseClient):
             title (``str``, *optional*):
                 Track name.
 
+            thumb (``str``, *optional*):
+                Thumbnail of the music file album cover.
+                The thumbnail should be in JPEG format and less than 200 KB in size.
+                A thumbnail's width and height should not exceed 90 pixels.
+                Thumbnails can't be reused and can be only uploaded as a new file.
+
             disable_notification (``bool``, *optional*):
                 Sends the message silently.
                 Users will receive a notification with no sound.
@@ -117,10 +124,12 @@ class SendAudio(BaseClient):
         style = self.html if parse_mode.lower() == "html" else self.markdown
 
         if os.path.exists(audio):
+            thumb = None if thumb is None else self.save_file(thumb)
             file = self.save_file(audio, progress=progress, progress_args=progress_args)
             media = types.InputMediaUploadedDocument(
                 mime_type=mimetypes.types_map.get("." + audio.split(".")[-1], "audio/mpeg"),
                 file=file,
+                thumb=thumb,
                 attributes=[
                     types.DocumentAttributeAudio(
                         duration=duration,
diff --git a/pyrogram/client/methods/messages/send_video.py b/pyrogram/client/methods/messages/send_video.py
index 87063ee3..4317d88b 100644
--- a/pyrogram/client/methods/messages/send_video.py
+++ b/pyrogram/client/methods/messages/send_video.py
@@ -74,9 +74,10 @@ class SendVideo(BaseClient):
                 Video height.
 
             thumb (``str``, *optional*):
-                Video thumbnail.
-                Pass a file path as string to send an image that exists on your local machine.
-                Thumbnail should have 90 or less pixels of width and 90 or less pixels of height.
+                Thumbnail of the video sent.
+                The thumbnail should be in JPEG format and less than 200 KB in size.
+                A thumbnail's width and height should not exceed 90 pixels.
+                Thumbnails can't be reused and can be only uploaded as a new file.
 
             supports_streaming (``bool``, *optional*):
                 Pass True, if the uploaded video is suitable for streaming.
diff --git a/pyrogram/session/session.py b/pyrogram/session/session.py
index 4ca32733..0d513430 100644
--- a/pyrogram/session/session.py
+++ b/pyrogram/session/session.py
@@ -199,6 +199,7 @@ class Session:
             i.join()
 
         self.net_worker_list.clear()
+        self.recv_queue.queue.clear()
 
         for i in self.results.values():
             i.event.set()