I don't receive message from group with chat bot

[blueperil]

I don't receive message from group with chat bot since the release 0.7.1. The log always shows a message like:

[[email protected]] Failed to handle Telegram update UpdateNewChannelMessage(message=Message(id=21396, to_id=PeerChannel(channel_id=1127537892), date=datetime.datetime(2020, 2, 7, 12, 26, 19, tzinfo=datetime.timezone.utc), message='[Meme] How do they do that?\nhttps://redd.it/f08948\n\nby @programmer_humor', out=False, mentioned=False, media_unread=False, silent=False, post=True, from_scheduled=False, legacy=False, edit_hide=False, from_id=None, fwd_from=None, via_bot_id=None, reply_to_msg_id=None, media=MessageMediaPhoto(photo=Photo(id=5327955567353900584, access_hash=678240594245998382, file_reference=b'\x02C4\xdc\xe4\x00\x00S\x94^=Wk\x19\x0b\x9a\xea\xa1$\xf7e/8\xc1?x/7\x1c', date=datetime.datetime(2020, 2, 7, 12, 26, 19, tzinfo=datetime.timezone.utc), sizes=[PhotoStrippedSize(type='i', bytes=b'\x01(&\xd1g*\xc4d\xe3?\xde\x14\t\x1b\xd7\'\x9f\xe2\x15VmB\xde9\x9d\x18\xb6T\xe0\xfc\x82\x96+\xf8%\x18ErGR\x10P\x05\x92\xed\x9e\t\xff\x00\xbe\x859w1\xe1\x8e\x07\xa1\x07\x9a\xaa\xfa\x85\xb4NQ\xd1\xf2{l\x15 \xbf\x84\x0e"\x90\x7f\xc0h\x02\xda\x82\x14\x02r}h\xaa\xf6\xd7\xd0\xdc\xc8\xd1\xc6\x182\x8c\x90F(\xa0\x0c+\xc1\xfe\x9b?\xfb\xe6\xa6\x82\t\xe1\x88\xb9\\+c\x1e\xf4\x12?\xb69\xc7\xfa\xef\xebZ\xf2\x00_\x0c3E\xae#\n\xe9\x9f\xcc\x0f\xb4\x80x\x19\x153\\\xc8\x9f.GA\x9e+F\xe25\x92)\x13\x1dy\x1fZ\xc7\x98\xe6g\xf4\xdch\xb0\x17\xb4~o$brJ\x7fQE\x1a/\xfc|\xbf\xfb\x9f\xd4Q@\xcb1\xd8\x03u,\xcd\xc9-\x95\xca\xf4\xab\x92\xa30\xf9q\x9fSE\x14\x08\xaa\xe9*\x0c\x08\xd9\xc9\xf4<Vsi\xf7$\xf3\x1b\x00{\xf1E\x14\x0c\xb9\xa7Z\xc9mr\xc1\xc3cg\\{\xd1E\x14\x01'), PhotoSize(type='m', location=FileLocationToBeDeprecated(volume_id=248207950, local_id=125707), w=302, h=320, size=28655), PhotoSize(type='x', location=FileLocationToBeDeprecated(volume_id=248207950, local_id=125708), w=460, h=487, size=54207)], dc_id=2, has_stickers=False), ttl_seconds=None), reply_markup=None, entities=[MessageEntityUrl(offset=28, length=22), MessageEntityMention(offset=55, length=17)], views=1, edit_date=None, post_author=None, grouped_id=None, restriction_reason=[]), pts=21430, pts_count=1)
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/mautrix_telegram/abstract_user.py", line 194, in _update_catch
    await self._update(update)
  File "/usr/lib/python3.8/site-packages/mautrix_telegram/abstract_user.py", line 241, in _update
    await self.update_message(update)
  File "/usr/lib/python3.8/site-packages/mautrix_telegram/abstract_user.py", line 424, in update_message
    if self.ignore_incoming_bot_events and self.relaybot and sender.id == self.relaybot.tgid:
AttributeError: 'NoneType' object has no attribute 'id'