Django-channels: Why is a message sent to all users instead of just one?

Question

Django

Hello, tell me please.
I'm making a video chat with Django and WebRTC and I have a feature to set a user on hold.
The function works fine, the admin presses the button, a signal is sent to the user via the channel through the self.channel_layer.send() function, an alert() appears on the screen and he is put on hold.
However, when I release it from hold, a signal sent to the same address goes to all users, although the channel is the same as the previous time.
Hold function:

if action == 'onhold':  # поставили на удержание
            await self.channel_layer.send(
                list(usersChannels.keys())[list(usersChannels.values()).index(message['peer'])], #канал на удержание
                {
                    'type': 'channel_message',
                    'action': 'onhold',
                    'room': 'room',
                    'message': {message['peer']: '1'},
                }
            )
            return

Removal function:

if action == 'unhold':  # убрали с удержания
            await self.channel_layer.send(
                list(usersChannels.keys())[list(usersChannels.values()).index(message['peer'])],
                {
                    'type': 'channel_message',
                    'action': 'unhold',
                    'room': 'room',
                    'message': {message['peer']: '1'},
                }
            )
            return

The whole code: https://pastebin.com/CicsUhy4 (sorry for the clumsiness)
I don’t even roughly understand what the reason is. I'm new to Channels, any tips would be welcome.