Describe the bug
VoiceNextConnection.UserJoined event callback does not fire, I subscribe to it but it never get executed

To Reproduce

1. Join a voicechannel and get a VoiceNextConnection
2. Subscribe to the UserJoined event
3. Have someone else join the channel

Expected behavior
The event should fire, but it doesnt

Additional context
This was also reported a few months ago in the discord