diff --git a/CommandHandler.cs b/CommandHandler.cs
index f8b2a59..04fd8b4 100644
--- a/CommandHandler.cs
+++ b/CommandHandler.cs
@@ -26,10 +26,9 @@ namespace DualScreenDemo
         /// 遙控器接收資料
         /// </summary>
         public async Task ProcessData(string indata)
-        {   
-            AddToHistory(indata);
+        {   AddToHistory(indata);
             // 遙控器測試
-            Console.WriteLine("遙控器: " + indata);
+            // Console.WriteLine($"[{DateTime.Now:HH:mm:ss.fff}] 遙控器: {indata}");
             switch (indata)
             {
                 case "A261A4": // 輸入
@@ -70,12 +69,12 @@ namespace DualScreenDemo
                 // 原唱
                 case "A26CA4":
                     Console.WriteLine("ToggleVocalRemoval Invoked");
-                    InvokeAction(() => VideoPlayerForm.Instance.ToggleVocalRemoval());
-                    InvokeAction(() => OverlayForm.MainForm.ShowOriginalSongLabel());
+                    SafeInvokeAction("A26CA4",() => VideoPlayerForm.Instance.ToggleVocalRemoval());
+                    SafeInvokeAction("A26CA4",() => OverlayForm.MainForm.ShowOriginalSongLabel());
                     break;
                 // 導唱
                 case "A26EA4":
-                    InvokeAction(() => VideoPlayerForm.Instance.ToggleVocalRemoval());
+                    SafeInvokeAction("A26EA4",() => VideoPlayerForm.Instance.ToggleVocalRemoval());
                     break;
                 case "A26DA4":
                     PauseOrResumeSong();
@@ -88,106 +87,131 @@ namespace DualScreenDemo
                     HandleArtistAnnouncements();
                     break;
                 case "A2B3A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowVolumeUpLabel());
+                    SafeInvokeAction("A2B3A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2B3A4",() => OverlayForm.MainForm.ShowVolumeUpLabel());
                     break;
                 case "A2B4A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowVolumeDownLabel());
+                    SafeInvokeAction("A2B4A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2B4A4",() => OverlayForm.MainForm.ShowVolumeDownLabel());
                     break;
                 case "A2B5A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowMicUpLabel());
+                    SafeInvokeAction("A2B5A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2B5A4",() => OverlayForm.MainForm.ShowMicUpLabel());
                     break;
                 case "A2B6A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowMicDownLabel());
+                    SafeInvokeAction("A2B6A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2B6A4",() => OverlayForm.MainForm.ShowMicDownLabel());
                     break;
                 case "A2C2A4":
-                    InvokeAction(() => OverlayForm.MainForm.HidemicLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowStandardLabel());
+                    SafeInvokeAction("A2C2A4",() => OverlayForm.MainForm.HidemicLabels());
+                    SafeInvokeAction("A2C2A4",() => OverlayForm.MainForm.ShowStandardLabel());
                     break;
                 case "A2C3A4":
-                    InvokeAction(() => OverlayForm.MainForm.HidemicLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowProfessionalLabel());
+                    SafeInvokeAction("A2C3A4",() => OverlayForm.MainForm.HidemicLabels());
+                    SafeInvokeAction("A2C3A4",() => OverlayForm.MainForm.ShowProfessionalLabel());
                     break;
                 case "A2C4A4":
-                    InvokeAction(() => OverlayForm.MainForm.HidemicLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowSquareLabel());
+                    SafeInvokeAction("A2C4A4",() => OverlayForm.MainForm.HidemicLabels());
+                    SafeInvokeAction("A2C4A4",() => OverlayForm.MainForm.ShowSquareLabel());
                     break;
                 case "A2C1A4":
-                    InvokeAction(() => OverlayForm.MainForm.HidemicLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowSingDownLabel());
+                    SafeInvokeAction("A2C1A4",() => OverlayForm.MainForm.HidemicLabels());
+                    SafeInvokeAction("A2C1A4",() => OverlayForm.MainForm.ShowSingDownLabel());
                     break;
                 case "A2D5A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowBrightLabel());
+                    SafeInvokeAction("A2D5A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2D5A4",() => OverlayForm.MainForm.ShowBrightLabel());
                     break;
                 case "A2D7A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowRomanticLabel());
+                    SafeInvokeAction("A2D7A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2D7A4",() => OverlayForm.MainForm.ShowRomanticLabel());
                     break;
-               /* case "A27CA4":
-                    InvokeAction(() => OverlayForm.MainForm.ShowMaleKeyLabel());
-                    break;
-                case "A282A4":
-                    InvokeAction(() => OverlayForm.MainForm.ShowFemaleKeyLabel());
-                    break;*/
+                /* case "A27CA4":
+                     InvokeAction(() => OverlayForm.MainForm.ShowMaleKeyLabel());
+                     break;
+                 case "A282A4":
+                     InvokeAction(() => OverlayForm.MainForm.ShowFemaleKeyLabel());
+                     break;*/
                 case "A2D6A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowSoftLabel());
+                    SafeInvokeAction("A2D6A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2D6A4",() => OverlayForm.MainForm.ShowSoftLabel());
                     break;
                 case "A2D8A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowDynamicLabel());
+                    SafeInvokeAction("A2D8A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A2D8A4",() => OverlayForm.MainForm.ShowDynamicLabel());
                     break;
                 case "A275A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowTintLabel());
+                    SafeInvokeAction("A275A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A275A4",() => OverlayForm.MainForm.ShowTintLabel());
                     break;
                 case "A283A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyUpLabel("↑升4調"));
-                break;
+                    SafeInvokeAction("A283A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A283A4",() => OverlayForm.MainForm.ShowKeyUpLabel("↑升4調"));
+                    break;
                 case "A282A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyUpLabel("↑升3調"));
+                    SafeInvokeAction("A282A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A282A4",() => OverlayForm.MainForm.ShowKeyUpLabel("↑升3調"));
                     break;
                 case "A281A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyUpLabel("↑升2調"));
+                    SafeInvokeAction("A281A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A281A4",() => OverlayForm.MainForm.ShowKeyUpLabel("↑升2調"));
                     break;
                 case "A280A4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyUpLabel("↑升1調"));
+                    SafeInvokeAction("A280A4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A280A4",() => OverlayForm.MainForm.ShowKeyUpLabel("↑升1調"));
                     break;
                 case "A27FA4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowStandardKeyLabel());
+                    SafeInvokeAction("A27FA4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A27FA4",() => OverlayForm.MainForm.ShowStandardKeyLabel());
                     break;
                 case "A27EA4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyDownLabel("↓降1調"));
+                    SafeInvokeAction("A27EA4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A27EA4",() => OverlayForm.MainForm.ShowKeyDownLabel("↓降1調"));
                     break;
                 case "A27DA4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyDownLabel("↓降2調"));
+                    SafeInvokeAction("A27EA4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A27EA4",() => OverlayForm.MainForm.ShowKeyDownLabel("↓降2調"));
                     break;
                 case "A27CA4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyDownLabel("↓降3調"));
+                    SafeInvokeAction("A27CA4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A27CA4",() => OverlayForm.MainForm.ShowKeyDownLabel("↓降3調"));
                     break;
                 case "A27BA4":
-                    InvokeAction(() => OverlayForm.MainForm.HideAllLabels());
-                    InvokeAction(() => OverlayForm.MainForm.ShowKeyDownLabel("↓降4調"));
+                    SafeInvokeAction("A27BA4",() => OverlayForm.MainForm.HideAllLabels());
+                    SafeInvokeAction("A27BA4",() => OverlayForm.MainForm.ShowKeyDownLabel("↓降4調"));
                     break;
                 default:
-                    if (Regex.IsMatch(indata, @"^A23\d+A4$")) 
+                    if (Regex.IsMatch(indata, @"^A23\d+A4$"))
                     {
                         HandleNumberInput(indata);
                     }
                     break;
             }
+            
+        }
+        private Dictionary<string, DateTime> _recentCommands = new();
+        private readonly TimeSpan _debounceInterval = TimeSpan.FromMilliseconds(300); // 最短觸發間隔
+        private void SafeInvokeAction(string commandKey, Action action)
+        {
+            /*var now = DateTime.Now;
+
+            if (_recentCommands.TryGetValue(commandKey, out DateTime lastTime))
+            {
+                if (now - lastTime < _debounceInterval)
+                    return; // 忽略短時間內的重複指令
+            }
+
+            _recentCommands[commandKey] = now;
+            */
+            // 真正執行 UI 操作
+            if (OverlayForm.MainForm.InvokeRequired)
+            {
+                OverlayForm.MainForm.BeginInvoke(action);
+            }
+            else
+            {
+                action();
+            }
         }
 
         private void AddToHistory(string indata)