diff --git a/v2rayN/ServiceLib/ViewModels/MsgViewModel.cs b/v2rayN/ServiceLib/ViewModels/MsgViewModel.cs
index f0e90a0f..8b3467bd 100644
--- a/v2rayN/ServiceLib/ViewModels/MsgViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/MsgViewModel.cs
@@ -10,10 +10,9 @@ namespace ServiceLib.ViewModels;
 public class MsgViewModel : MyReactiveObject
 {
     private readonly ConcurrentQueue<string> _queueMsg = new();
-    private readonly StringBuilder _msgBuilder = new();
-    private readonly int _numMaxMsg = 500;
-    private bool _lastMsgFilterNotAvailable;
-    private bool _blLockShow = false;
+    private volatile bool _lastMsgFilterNotAvailable;
+    private int _showLock = 0; // 0 = unlocked, 1 = locked
+    public int NumMaxMsg { get; } = 50;
 
     [Reactive]
     public string MsgFilter { get; set; }
@@ -35,50 +34,52 @@ public class MsgViewModel : MyReactiveObject
         this.WhenAnyValue(
           x => x.AutoRefresh,
           y => y == true)
-              .Subscribe(c => { _config.MsgUIItem.AutoRefresh = AutoRefresh; });
+              .Subscribe(c => _config.MsgUIItem.AutoRefresh = AutoRefresh);
 
         AppEvents.SendMsgViewRequested
          .AsObservable()
          //.ObserveOn(RxApp.MainThreadScheduler)
-         .Subscribe(async content => await AppendQueueMsg(content));
+         .Subscribe(content => _ = AppendQueueMsg(content));
     }
 
     private async Task AppendQueueMsg(string msg)
-    {        
+    {
         if (AutoRefresh == false)
         {
             return;
         }
-        _ = EnqueueQueueMsg(msg);
 
-        if (_blLockShow)
-        {
-            return;
-        }
+        EnqueueQueueMsg(msg);
+
         if (!_config.UiItem.ShowInTaskbar)
         {
             return;
         }
 
-        _blLockShow = true;
-
-        _msgBuilder.Clear();
-        //foreach (var it in _queueMsg)
-        //{
-        //    _msgBuilder.Append(it);
-        //}
-        while (_queueMsg.TryDequeue(out var line))
+        if (Interlocked.CompareExchange(ref _showLock, 1, 0) != 0)
         {
-            _msgBuilder.Append(line);
+            return;
         }
 
+        try
+        {
+            await Task.Delay(500).ConfigureAwait(false);
 
-        await _updateView?.Invoke(EViewAction.DispatcherShowMsg, _msgBuilder.ToString());
+            var sb = new StringBuilder();
+            while (_queueMsg.TryDequeue(out var line))
+            {
+                sb.Append(line);
+            }
 
-        _blLockShow = false;
+            await _updateView?.Invoke(EViewAction.DispatcherShowMsg, sb.ToString());
+        }
+        finally
+        {
+            Interlocked.Exchange(ref _showLock, 0);
+        }
     }
 
-    private async Task EnqueueQueueMsg(string msg)
+    private void EnqueueQueueMsg(string msg)
     {
         //filter msg
         if (MsgFilter.IsNotEmpty() && !_lastMsgFilterNotAvailable)
@@ -97,26 +98,17 @@ public class MsgViewModel : MyReactiveObject
             }
         }
 
-        //Enqueue
-        if (_queueMsg.Count > _numMaxMsg)
-        {
-            for (int k = 0; k < _queueMsg.Count - _numMaxMsg; k++)
-            {
-                _queueMsg.TryDequeue(out _);
-            }
-        }
         _queueMsg.Enqueue(msg);
         if (!msg.EndsWith(Environment.NewLine))
         {
             _queueMsg.Enqueue(Environment.NewLine);
         }
-        await Task.CompletedTask;
     }
 
-    public void ClearMsg()
-    {
-        _queueMsg.Clear();
-    }
+    //public void ClearMsg()
+    //{
+    //    _queueMsg.Clear();
+    //}
 
     private void DoMsgFilter()
     {
diff --git a/v2rayN/v2rayN.Desktop/ViewModels/ThemeSettingViewModel.cs b/v2rayN/v2rayN.Desktop/ViewModels/ThemeSettingViewModel.cs
index 3473cf23..ae12fa07 100644
--- a/v2rayN/v2rayN.Desktop/ViewModels/ThemeSettingViewModel.cs
+++ b/v2rayN/v2rayN.Desktop/ViewModels/ThemeSettingViewModel.cs
@@ -5,6 +5,7 @@ using Avalonia.Controls.Notifications;
 using Avalonia.Controls.Primitives;
 using Avalonia.Media;
 using Avalonia.Styling;
+using AvaloniaEdit;
 using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
 using Semi.Avalonia;
@@ -112,7 +113,8 @@ public class ThemeSettingViewModel : MyReactiveObject
             x.OfType<ContextMenu>(),
             x.OfType<DataGridRow>(),
             x.OfType<ListBoxItem>(),
-            x.OfType<HeaderedContentControl>()
+            x.OfType<HeaderedContentControl>(),
+            x.OfType<TextEditor>()
         ));
         style.Add(new Setter()
         {
@@ -153,7 +155,8 @@ public class ThemeSettingViewModel : MyReactiveObject
                 x.OfType<DataGridRow>(),
                 x.OfType<ListBoxItem>(),
                 x.OfType<HeaderedContentControl>(),
-                x.OfType<WindowNotificationManager>()
+                x.OfType<WindowNotificationManager>(),
+                x.OfType<TextEditor>()
             ));
             style.Add(new Setter()
             {
diff --git a/v2rayN/v2rayN.Desktop/Views/MsgView.axaml b/v2rayN/v2rayN.Desktop/Views/MsgView.axaml
index 54cd078e..cb8b2cbe 100644
--- a/v2rayN/v2rayN.Desktop/Views/MsgView.axaml
+++ b/v2rayN/v2rayN.Desktop/Views/MsgView.axaml
@@ -75,7 +75,8 @@
             Name="txtMsg"
             Margin="{StaticResource Margin8}"
             IsReadOnly="True"
-            VerticalScrollBarVisibility="Auto">
+            VerticalScrollBarVisibility="Auto"
+            WordWrap="True">
             <avaloniaEdit:TextEditor.ContextFlyout>
                 <MenuFlyout>
                     <MenuItem
diff --git a/v2rayN/v2rayN.Desktop/Views/MsgView.axaml.cs b/v2rayN/v2rayN.Desktop/Views/MsgView.axaml.cs
index 75889fff..3a47532b 100644
--- a/v2rayN/v2rayN.Desktop/Views/MsgView.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/MsgView.axaml.cs
@@ -1,5 +1,4 @@
 using System.Reactive.Disposables;
-using Avalonia.Controls;
 using Avalonia.Interactivity;
 using Avalonia.ReactiveUI;
 using Avalonia.Threading;
@@ -10,12 +9,9 @@ namespace v2rayN.Desktop.Views;
 
 public partial class MsgView : ReactiveUserControl<MsgViewModel>
 {
-    private readonly ScrollViewer _scrollViewer;
-
     public MsgView()
     {
         InitializeComponent();
-        _scrollViewer = this.FindControl<ScrollViewer>("msgScrollViewer");
 
         ViewModel = new MsgViewModel(UpdateViewHandler);
 
@@ -44,19 +40,23 @@ public partial class MsgView : ReactiveUserControl<MsgViewModel>
 
     private void ShowMsg(object msg)
     {
-        // txtMsg.Text = msg.ToString();
-        txtMsg.AppendText(msg.ToString());
+        if (txtMsg.Document.LineCount > ViewModel?.NumMaxMsg)
+        {
+            ClearMsg();
+        }
+
         if (togScrollToEnd.IsChecked ?? true)
         {
+            //txtMsg.ScrollToLine(txtMsg.Document.LineCount);
             txtMsg.ScrollToEnd();
-            _scrollViewer?.ScrollToEnd();
         }
+        txtMsg.AppendText(msg.ToString());
     }
 
     public void ClearMsg()
     {
-        ViewModel?.ClearMsg();
-        txtMsg.Text = "";
+        txtMsg.Clear();
+        txtMsg.AppendText("----- Message cleared -----\n");
     }
 
     private void menuMsgViewSelectAll_Click(object? sender, RoutedEventArgs e)
diff --git a/v2rayN/v2rayN/Views/MsgView.xaml.cs b/v2rayN/v2rayN/Views/MsgView.xaml.cs
index 3cc1fdfa..af8eb5f4 100644
--- a/v2rayN/v2rayN/Views/MsgView.xaml.cs
+++ b/v2rayN/v2rayN/Views/MsgView.xaml.cs
@@ -48,18 +48,25 @@ public partial class MsgView
     private void ShowMsg(object msg)
     {
         txtMsg.BeginChange();
-        txtMsg.Text = msg.ToString();
+
+        if (txtMsg.LineCount > ViewModel?.NumMaxMsg)
+        {
+            ClearMsg();
+        }
+
+        txtMsg.AppendText(msg.ToString());
         if (togScrollToEnd.IsChecked ?? true)
         {
             txtMsg.ScrollToEnd();
         }
+
         txtMsg.EndChange();
     }
 
     public void ClearMsg()
     {
-        ViewModel?.ClearMsg();
         txtMsg.Clear();
+        txtMsg.AppendText("----- Message cleared -----\n");
     }
 
     private void menuMsgViewSelectAll_Click(object sender, System.Windows.RoutedEventArgs e)