diff --git a/src/libs/KeyboardShortcut/isEnterWhileComposition.ts b/src/libs/KeyboardShortcut/isEnterWhileComposition.ts
index 71ec27f21c13..6e65ee96aff1 100644
--- a/src/libs/KeyboardShortcut/isEnterWhileComposition.ts
+++ b/src/libs/KeyboardShortcut/isEnterWhileComposition.ts
@@ -16,10 +16,23 @@ const isEnterWhileComposition = (event: KeyboardEvent | React.KeyboardEvent): bo
     // On Safari, isComposing returns false on Enter keypress event even for IME confirmation. Although keyCode is deprecated,
     // reading keyCode is the only way available to distinguish Enter keypress event for IME confirmation.
     if (CONST.BROWSER.SAFARI === Browser.getBrowser()) {
+        // eslint-disable-next-line @typescript-eslint/no-deprecated
         return event.keyCode === 229;
     }
 
-    return event.key === CONST.KEYBOARD_SHORTCUTS.ENTER.shortcutKey && (event as unknown as NativeSyntheticEvent<KeyboardEvent>)?.nativeEvent?.isComposing;
+    // Check if this is a native KeyboardEvent (has isComposing directly) or a React synthetic event (has nativeEvent.isComposing)
+    // For native KeyboardEvent, isComposing is directly on the event
+    // For React synthetic events, it's on event.nativeEvent.isComposing
+    let isComposing: boolean | undefined;
+
+    if (event instanceof KeyboardEvent) {
+        isComposing = event.isComposing;
+    } else {
+        const nativeEvent = (event as unknown as NativeSyntheticEvent<KeyboardEvent>)?.nativeEvent;
+        isComposing = nativeEvent?.isComposing;
+    }
+
+    return event.key === CONST.KEYBOARD_SHORTCUTS.ENTER.shortcutKey && !!isComposing;
 };
 
 export default isEnterWhileComposition;