Why message is being sent to everyone instead of one user in Django Channels?

Question

I am building a WebRTC videochat app. I have a function of holding the user on a line, which works great: I press a button, the signal goes to the server, the server sends it to the user using self.channel_layer.send(), the user gets alert() and puts on hold. But when I want to unhold the user, the server sends a signal to everyone in the room, despite all the parameters are the same as in "hold" function. Holding user:

if action == 'onhold':  #holding user
            await self.channel_layer.send(
                list(usersChannels.keys())[list(usersChannels.values()).index(message['peer'])], #channel to hold
                {
                    'type': 'channel_message',
                    'action': 'onhold',
                    'room': 'room',
                    'message': {message['peer']: '1'},
                }
            )
            return

Unholding user:

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

Full code here: https://pastebin.com/CicsUhy4