diff --git a/ui/src/components/CustomTerminal/helper/index.ts b/ui/src/components/CustomTerminal/helper/index.ts
index 6dd45b32..abae2774 100644
--- a/ui/src/components/CustomTerminal/helper/index.ts
+++ b/ui/src/components/CustomTerminal/helper/index.ts
@@ -22,10 +22,14 @@ export const sendEventToLuna = (
     name: string,
     data: any,
     lunaId: string | null = '',
-    origin: string | null = null
+    origin: string | null = ''
 ) => {
     if (lunaId !== null && origin !== null) {
-        window.parent.postMessage({ name, id: lunaId, data }, origin);
+        try {
+            window.parent.postMessage({ name, id: lunaId, data }, origin);
+        } catch (e) {
+            console.info(e);
+        }
     }
 };
 
diff --git a/ui/src/hooks/helper/index.ts b/ui/src/hooks/helper/index.ts
index da6c78a9..38c62404 100644
--- a/ui/src/hooks/helper/index.ts
+++ b/ui/src/hooks/helper/index.ts
@@ -113,15 +113,22 @@ export const handleTerminalResize = (
  *
  * @param e
  * @param terminal
+ * @param lunaId
+ * @param origin
  */
-export const handleCustomKey = (e: KeyboardEvent, terminal: Terminal): boolean => {
+export const handleCustomKey = (
+    e: KeyboardEvent,
+    terminal: Terminal,
+    lunaId: string,
+    origin: string
+): boolean => {
     if (e.altKey && e.shiftKey && (e.key === 'ArrowRight' || e.key === 'ArrowLeft')) {
         switch (e.key) {
             case 'ArrowRight':
-                window.parent.postMessage({ name: 'KEYEVENT', data: 'alt+shift+right' });
+                sendEventToLuna('KEYEVENT', 'alt+shift+right', lunaId, origin);
                 break;
             case 'ArrowLeft':
-                window.parent.postMessage({ name: 'KEYEVENT', data: 'alt+shift+left' });
+                sendEventToLuna('KEYEVENT', 'alt+shift+left', lunaId, origin);
                 break;
         }
 
diff --git a/ui/src/hooks/useTerminal.ts b/ui/src/hooks/useTerminal.ts
index 55ca6aae..f6e375f2 100644
--- a/ui/src/hooks/useTerminal.ts
+++ b/ui/src/hooks/useTerminal.ts
@@ -359,8 +359,6 @@ export const useTerminal = async (el: HTMLElement, option: ICallbackOptions): Pr
 
             switch (message.name) {
                 case 'PING': {
-                    if (lunaId.value != null) return;
-
                     lunaId.value = message.id;
                     origin.value = e.origin;
 
@@ -409,7 +407,7 @@ export const useTerminal = async (el: HTMLElement, option: ICallbackOptions): Pr
                 handleTerminalSelection(terminal!, termSelectionText);
             });
             terminal.attachCustomKeyEventHandler((e: KeyboardEvent) => {
-                return handleCustomKey(e, terminal!);
+                return handleCustomKey(e, terminal!, lunaId.value, origin.value);
             });
             terminal.onData((data: string) => {
                 lastSendTime.value = new Date();