[Netcode] A ConnectionRequestMessage was received from a client when the connection has already been established

[Vegaxys]

I have this bug when a client wants to join an open lobby with a networkmanager started (server side). The client don't have its servermanager started and he is no in any lobby when he tried to join this lobby.

Screenshots

Environment

• OS: Windows 11
• Unity 6000.0.21f1
• Netcode [2.1.1]
• Lobby [1.2.2]
• Relay [1.1.1]
• using RelayUnityTransport
• client use LobbyService.Instance.JoinLobbyByIdAsync() to join with the lobby code and a basic player data as joinOptions

[michalChrobot]

Hi, we saw several similar issues before. Which version of com.unity.transport are you using? I believe this should be fixed in com.unity.transport 2.3.0 as well as in 1.5.0. Please let us know if this would solve the problem, otherwise we will dig deeper into it

[Vegaxys]

Hello, thx for your fast reply.

I'm using Unity Transport 2.4.0 from the 25/10/2024 (maybe should I downgrade to 2.3.0 ?)

[michalChrobot]

Hmm, downgrading shouldn't be the fix, let me ask around and come back to you. In the meantime I saw few similar issues (#2794 #2601 or this one)

[michalChrobot]

Can you provide a link to a project on which we could try to replicate the problem? Also by design it shouldn't happen if you are using only out transport package so I wonder if any of the other issues I mentioned sound similar to what you are doing or if you are using any other transport solution simultaneously to com.unity.transport