diff --git a/telethon/client/chats.py b/telethon/client/chats.py
index 56031f19..ee2aa56b 100644
--- a/telethon/client/chats.py
+++ b/telethon/client/chats.py
@@ -179,8 +179,9 @@ class ChatMethods(UserMethods):
         """
         total = [0]
         kwargs['_total'] = total
-        participants = UserList(x async for x in
-                                self.iter_participants(*args, **kwargs))
+        participants = UserList()
+        async for x in self.iter_participants(*args, **kwargs):
+            participants.append(x)
         participants.total = total[0]
         return participants
 
diff --git a/telethon/client/dialogs.py b/telethon/client/dialogs.py
index d42d1c49..c7b9c6d7 100644
--- a/telethon/client/dialogs.py
+++ b/telethon/client/dialogs.py
@@ -9,6 +9,7 @@ from ..tl import types, functions, custom
 
 
 class DialogMethods(UserMethods):
+
     # region Public methods
 
     @async_generator
@@ -103,10 +104,13 @@ class DialogMethods(UserMethods):
         """
         total = [0]
         kwargs['_total'] = total
-        dialogs = UserList(x async for x in self.iter_dialogs(*args, **kwargs))
+        dialogs = UserList()
+        async for x in self.iter_dialogs(*args, **kwargs):
+            dialogs.append(x)
         dialogs.total = total[0]
         return dialogs
 
+    @async_generator
     async def iter_drafts(self):  # TODO: Ability to provide a `filter`
         """
         Iterator over all open draft messages.
@@ -124,6 +128,9 @@ class DialogMethods(UserMethods):
         """
         Same as :meth:`iter_drafts`, but returns a list instead.
         """
-        return list(x async for x in self.iter_drafts())
+        result = []
+        async for x in self.iter_drafts():
+            result.append(x)
+        return result
 
     # endregion
diff --git a/telethon/client/messages.py b/telethon/client/messages.py
index 13d98820..93b4f573 100644
--- a/telethon/client/messages.py
+++ b/telethon/client/messages.py
@@ -244,7 +244,9 @@ class MessageMethods(UploadMethods, MessageParseMethods):
             else:
                 kwargs['limit'] = 1
 
-        msgs = UserList(x async for x in self.iter_messages(*args, **kwargs))
+        msgs = UserList()
+        async for x in self.iter_messages(*args, **kwargs):
+            msgs.append(x)
         msgs.total = total[0]
         if 'ids' in kwargs and not utils.is_list_like(kwargs['ids']):
             return msgs[0]
diff --git a/telethon/tl/custom/message.py b/telethon/tl/custom/message.py
index 001b9b32..2124249f 100644
--- a/telethon/tl/custom/message.py
+++ b/telethon/tl/custom/message.py
@@ -269,24 +269,26 @@ class Message:
         return bool(self.original_message.reply_to_msg_id)
 
     @property
-    def buttons(self):
+    async def buttons(self):
         """
         Returns a matrix (list of lists) containing all buttons of the message
         as `telethon.tl.custom.messagebutton.MessageButton` instances.
         """
         if self._buttons is None and self.original_message.reply_markup:
+            sender = await self.input_sender
+            chat = await self.input_chat
             if isinstance(self.original_message.reply_markup, (
                     types.ReplyInlineMarkup, types.ReplyKeyboardMarkup)):
                 self._buttons = [[
-                    MessageButton(self._client, button, self.input_sender,
-                                  self.input_chat, self.original_message.id)
+                    MessageButton(self._client, button, sender, chat,
+                                  self.original_message.id)
                     for button in row.buttons
                 ] for row in self.original_message.reply_markup.rows]
                 self._buttons_flat = [x for row in self._buttons for x in row]
         return self._buttons
 
     @property
-    def button_count(self):
+    async def button_count(self):
         """
         Returns the total button count.
         """
@@ -398,7 +400,7 @@ class Message:
             if not self.original_message.reply_to_msg_id:
                 return None
             self._reply_message = await self._client.get_messages(
-                self.input_chat if self.is_channel else None,
+                await self.input_chat if self.is_channel else None,
                 ids=self.original_message.reply_to_msg_id
             )