suggested changes from PR

Assets/BossRoom/Scripts/Client/ClientCharacterVisualization.cs

         /// <inheritdoc />
         public override void NetworkStart()
         {
-            if (!IsClient && !IsHost)
+            if (!IsClient)
             {
                 enabled = false;
             }

Assets/BossRoom/Scripts/Server/Game/State/ServerBossRoomState.cs

         public override void NetworkStart()
         {
             base.NetworkStart();
-            if (!IsServer && !IsHost)
+            if (!IsServer)
             {
                 this.enabled = false;
             }
                 // the ServerGNHLogic's approval-callback is done, meaning that if we get this event,
                 // the client is officially allowed to be here.
-                MLAPI.NetworkingManager.Singleton.OnClientConnectedCallback += OnClientConnected;
+                NetworkingManager.Singleton.OnClientConnectedCallback += OnClientConnected;
+
+                // if any other players are already connected to us (i.e. they connected while we were 
+                // in the login screen), give them player characters
+                foreach (var connection in NetworkingManager.Singleton.ConnectedClientsList)
+                {
+                    SpawnPlayer(connection.ClientId);
+                }
 
                 if (IsHost)
                 {