yep

Shogi.UI/Pages/Home/GameBrowser.razor

@@ -1,7 +1,10 @@
-@using Shogi.Contracts.Types;
+@implements IDisposable;
+
+@using Shogi.Contracts.Types;
 @using System.ComponentModel.DataAnnotations;
 @using System.Net;
 @using System.Text.Json;
+
 @inject IShogiApi ShogiApi;
 @inject ShogiSocket ShogiSocket;
 @inject AccountState Account;
@@ -76,7 +79,6 @@
                         The name you chose is taken; choose another.
                     </div>
                 }
-
             </EditForm>
         </div>
     </div>
@@ -92,17 +94,12 @@
     private SessionMetadata? activeSession;
     private HttpStatusCode? createSessionStatusCode;
 
-    protected override async Task OnInitializedAsync()
+    protected override void OnInitialized()
     {
-        ShogiSocket.OnCreateGameMessage += async (sender, message) => await FetchSessions();
-        Account.LoginChangedEvent += async (sender, message) =>
-        {
-            Console.WriteLine($"LoginEvent. Message={JsonSerializer.Serialize(message)}.");
-            if (message.User != null)
-            {
-                await FetchSessions();
-            }
-        };
+        base.OnInitialized();
+        ShogiSocket.OnSessionCreated += FetchSessions;
+        ShogiSocket.OnSessionJoined += FetchSessions;
+        Account.LoginChangedEvent += LoginChangedEvent_FetchSessions;
     }
 
     string ActiveCss(SessionMetadata s) => s == activeSession ? "active" : string.Empty;
@@ -112,6 +109,14 @@
         activeSession = s;
         ActiveSessionChanged?.Invoke(s);
     }
+    Task LoginChangedEvent_FetchSessions(LoginEventArgs args)
+    {
+        if (args.User != null)
+        {
+            return FetchSessions();
+        }
+        return Task.CompletedTask;
+    }
 
     async Task FetchSessions()
     {
@@ -129,6 +134,13 @@
         createSessionStatusCode = await ShogiApi.PostSession(createForm.Name, createForm.IsPrivate);
     }
 
+    public void Dispose()
+    {
+        ShogiSocket.OnSessionCreated -= FetchSessions;
+        ShogiSocket.OnSessionJoined -= FetchSessions;
+        Account.LoginChangedEvent -= LoginChangedEvent_FetchSessions;
+    }
+
     private class CreateForm
     {
         [Required]