diff --git a/frontend/components/screen/ScreenDesigner.tsx b/frontend/components/screen/ScreenDesigner.tsx
index 665ab16f..7479c9c9 100644
--- a/frontend/components/screen/ScreenDesigner.tsx
+++ b/frontend/components/screen/ScreenDesigner.tsx
@@ -515,8 +515,8 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
           current[finalKey] = value;
 
           // gridColumns 변경 시 크기 자동 업데이트
-          if (path === "gridColumns" && gridInfo) {
-            const updatedSize = updateSizeFromGridColumns(newComp, layout.gridSettings as GridUtilSettings);
+          if (path === "gridColumns" && prevLayout.gridSettings) {
+            const updatedSize = updateSizeFromGridColumns(newComp, prevLayout.gridSettings as GridUtilSettings);
             newComp.size = updatedSize;
           }
 
@@ -524,7 +524,6 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
           if (
             (path === "size.width" || path === "size.height") &&
             prevLayout.gridSettings?.snapToGrid &&
-            gridInfo &&
             newComp.type !== "group"
           ) {
             // 현재 해상도에 맞는 격자 정보로 스냅 적용