diff --git a/src/middleware/BootstrapBlazor.Middleware/BootstrapBlazor.Middleware.csproj b/src/middleware/BootstrapBlazor.Middleware/BootstrapBlazor.Middleware.csproj
index 70a3fc23..695aa6bf 100644
--- a/src/middleware/BootstrapBlazor.Middleware/BootstrapBlazor.Middleware.csproj
+++ b/src/middleware/BootstrapBlazor.Middleware/BootstrapBlazor.Middleware.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Version>11.0.0-rc.3.3</Version>
+    <Version>11.0.0-rc.3.4</Version>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/middleware/BootstrapBlazor.Middleware/ConnectionSnapshot.cs b/src/middleware/BootstrapBlazor.Middleware/ConnectionSnapshot.cs
deleted file mode 100644
index bb587709..00000000
--- a/src/middleware/BootstrapBlazor.Middleware/ConnectionSnapshot.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright (c) BootstrapBlazor & Argo Zhang (argo@live.ca). All rights reserved.
-// Licensed under the Apache License, Version 2.0.
-
-namespace BootstrapBlazor.Components;
-
-/// <summary>
-/// <para lang="zh">SignalR 连接快照及服务端计算的在线连接数量</para>
-/// <para lang="en">SignalR connection snapshot and the online connection count computed by the server</para>
-/// </summary>
-public sealed record ConnectionSnapshot(long Count, ICollection<ConnectionItem> Connections);
diff --git a/src/middleware/BootstrapBlazor.Middleware/DefaultDispatchService.cs b/src/middleware/BootstrapBlazor.Middleware/DefaultDispatchService.cs
index eda6ef70..450c7e0c 100644
--- a/src/middleware/BootstrapBlazor.Middleware/DefaultDispatchService.cs
+++ b/src/middleware/BootstrapBlazor.Middleware/DefaultDispatchService.cs
@@ -50,6 +50,7 @@ internal async Task DispatchAsync(DispatchEntry<TEntry> entry, string? excludedC
                 Task callbackTask;
                 lock (_locker)
                 {
+                    cancellationToken.ThrowIfCancellationRequested();
                     if (!_subscriptions.Contains(subscription))
                     {
                         continue;
@@ -59,7 +60,8 @@ internal async Task DispatchAsync(DispatchEntry<TEntry> entry, string? excludedC
                     callbackTask = subscription.Callback(entry);
                 }
 
-                await callbackTask;
+                await callbackTask.WaitAsync(cancellationToken);
+                cancellationToken.ThrowIfCancellationRequested();
             }
             catch (Exception ex) when (!cancellationToken.IsCancellationRequested)
             {