diff --git a/packages/common/components/src/ui/lnb/index.tsx b/packages/common/components/src/ui/lnb/index.tsx
index 26d79e21e..bdba29d8c 100644
--- a/packages/common/components/src/ui/lnb/index.tsx
+++ b/packages/common/components/src/ui/lnb/index.tsx
@@ -118,7 +118,9 @@ export function LNB({
     const nextControl = menuControls[nextIndex];
 
     if (nextControl) {
+      // 모바일 Sheet(Radix FocusScope)의 Tab 순환 처리가 이동된 포커스 기준으로 다시 동작하지 않도록 전파 차단
       event.preventDefault();
+      event.stopPropagation();
       nextControl.focus();
       nextControl.scrollIntoView({ block: "nearest" });
     } else if (
@@ -132,6 +134,7 @@ export function LNB({
 
       if (closeButton) {
         event.preventDefault();
+        event.stopPropagation();
         closeButton.focus();
       }
     }