NetworkServer.OnDisconnected removed. There is only one way to invoke the disconnect handling, which is OnTransportDisconnected. fixes bugs where OnDisconnect would handle the disconnect, not remove the connection, then the Transport callback would call OnTransportDisconnected->OnDisconnect a second time. fixes #2706 and many more (007dd80)
#2579 - Weaver skips already weaved assemblies when restarting Unity. fixes a bug where GeneratedNetworkCode class would exist twice, while the newer one was missing some writers (3a9d954)
#2579 "No writer found" error when running Mirror tests in Unity 2020.3 Editor. fixes the first bug in editor, but maybe not the runtime bug? or maybe it does. (4176424)
#2517 - NetworkManager.UpdateScene wraps FinishLoadScene in try/catch to guarantee loadingSceneAsync being cleared no matter what. fixes a bug where if FinishLoadScene throws then loadingSceneAsync is never cleared and the code runs every update (b7c63c3)