diff --git a/frontend/src/Component/Contribution/ContributionPage.js b/frontend/src/Component/Contribution/ContributionPage.js
index 130d2c0b..c74a4ffd 100644
--- a/frontend/src/Component/Contribution/ContributionPage.js
+++ b/frontend/src/Component/Contribution/ContributionPage.js
@@ -400,8 +400,7 @@ function ContributionPage() {
   }
 
   @media (max-width: 800px) {
-    font-size: 8px;
-    padding: 1px;
+    visibility: hidden;
   }
 `;
 
diff --git a/frontend/src/Component/Page/utils/yjs/BlockLock.js b/frontend/src/Component/Page/utils/yjs/BlockLock.js
index 387c549b..29f1a063 100644
--- a/frontend/src/Component/Page/utils/yjs/BlockLock.js
+++ b/frontend/src/Component/Page/utils/yjs/BlockLock.js
@@ -383,10 +383,12 @@ const BlockLock = forwardRef(({ ydocRef, editorRef }, ref) => {
           } 
         } else {
           removeYjsMapUnLockData(nickname);
-          yLineLocks.set(guid.toString(), nickname);
-          yUserLocks.set(nickname, guid.toString());
-          addIdToParagraph(guid.toString());
-          toastr.success(`블록 편집 잠금이 설정되었습니다.`);
+          ydocRef.current.transact(() => {
+            yLineLocks.set(guid.toString(), nickname);
+            yUserLocks.set(nickname, guid.toString());
+            addIdToParagraph(guid.toString());
+            toastr.success(`블록 편집 잠금이 설정되었습니다.`);
+          });
         }
       } catch (error) {
         const hoverDiv = document.querySelector(".hoverDiv");