diff --git a/com.twin.app.shoptime/src/actions/panelActions.js b/com.twin.app.shoptime/src/actions/panelActions.js
index 6706a6f8..8e5fcddf 100644
--- a/com.twin.app.shoptime/src/actions/panelActions.js
+++ b/com.twin.app.shoptime/src/actions/panelActions.js
@@ -299,19 +299,28 @@ export const navigateToDetail = ({
         // PlayerPanel에서 온 경우
         const { hidePlayerOverlays } = require('./videoPlayActions');
         const statePanels = panels || getState().panels.panels;
-        const playerPanelEntry = statePanels.find((p) => p.name === panel_names.PLAYER_PANEL);
+        const playerPanelEntry =
+          [...statePanels].reverse().find(
+            (p) => p.name === panel_names.PLAYER_PANEL || p.name === panel_names.PLAYER_PANEL_NEW
+          ) || null;
 
         // DetailPanel push 전에 VideoPlayer 오버레이 숨김
         dispatch(hidePlayerOverlays());
 
-        // PlayerPanel이 modal=true라면 풀스크린 백그라운드로 전환
-        if (playerPanelEntry?.panelInfo?.modal) {
+        // PlayerPanel이 modal=true라면 풀스크린 백그라운드로 전환 + lockModalFalse 설정 (Detail 동안 modal 복귀 방지)
+        if (playerPanelEntry) {
           dispatch(
             updatePanel({
-              name: panel_names.PLAYER_PANEL,
+              name: playerPanelEntry.name,
               panelInfo: {
                 ...playerPanelEntry.panelInfo,
                 modal: false,
+                modalContainerId: undefined,
+                modalStyle: undefined,
+                modalScale: undefined,
+                shouldShrinkTo1px: false,
+                isHidden: false,
+                lockModalFalse: true,
               },
             })
           );
diff --git a/com.twin.app.shoptime/src/actions/playActions.js b/com.twin.app.shoptime/src/actions/playActions.js
index 5a377615..23f2b176 100644
--- a/com.twin.app.shoptime/src/actions/playActions.js
+++ b/com.twin.app.shoptime/src/actions/playActions.js
@@ -73,6 +73,16 @@ export const startVideoPlayer =
     ...rest
   }) =>
   (dispatch, getState) => {
+    const caller = new Error().stack?.split('\n')[2]?.trim();
+    console.log('[PTRACE-SP] startVideoPlayer call', {
+      modal,
+      modalContainerId,
+      modalClassName,
+      videoId,
+      showUrl,
+      caller,
+    });
+
     dlog(
       '[startVideoPlayer] ✅ START - videoId:',
       videoId,
@@ -105,6 +115,9 @@ export const startVideoPlayer =
 
     // 기존 PlayerPanel이 어디든 있으면 완전히 초기화: 타이머 정리 후 pop → 새로 push
     if (existingPlayerPanel) {
+      console.log('[PTRACE-SP] startVideoPlayer: popping existing player before push', {
+        stack: panels.map((p) => p.name),
+      });
       dlog('[startVideoPlayer] 🔄 Resetting existing PLAYER_PANEL before start');
       clearAllVideoTimers();
       dispatch(popPanel(panel_names.PLAYER_PANEL));
@@ -182,6 +195,17 @@ export const startVideoPlayerNew =
     ...rest
   }) =>
   (dispatch, getState) => {
+    const caller = new Error().stack?.split('\n')[2]?.trim();
+    console.log('[PTRACE-SPN] startVideoPlayerNew call', {
+      bannerId,
+      modal,
+      modalContainerId,
+      modalClassName,
+      videoId,
+      showUrl,
+      caller,
+    });
+
     dlog(
       '[startVideoPlayerNew] *** ✅ START - bannerId:',
       bannerId,
@@ -215,6 +239,9 @@ export const startVideoPlayerNew =
 
     // 기존 PlayerPanel이 있으면 완전히 초기화: 타이머 정리 후 pop → 새로 push
     if (existingPlayerPanel) {
+      console.log('[PTRACE-SPN] popping existing player before push', {
+        stack: panels.map((p) => p.name),
+      });
       dlog('[startVideoPlayerNew] *** 🔄 Resetting existing PLAYER_PANEL before start');
       clearAllVideoTimers();
       dispatch(popPanel(panel_names.PLAYER_PANEL));
diff --git a/com.twin.app.shoptime/src/reducers/panelReducer.js b/com.twin.app.shoptime/src/reducers/panelReducer.js
index 953409f3..a1518e47 100644
--- a/com.twin.app.shoptime/src/reducers/panelReducer.js
+++ b/com.twin.app.shoptime/src/reducers/panelReducer.js
@@ -132,6 +132,60 @@ export const panelsReducer = (state = initialState, action) => {
     case types.UPDATE_PANEL: {
       let lastIndex = -1;
       let lastAction = 'update';
+      const hasDetailPanel = state.panels.some((p) => p.name === panel_names.DETAIL_PANEL);
+      const isPlayerPanel =
+        action.payload.name === panel_names.PLAYER_PANEL ||
+        action.payload.name === panel_names.PLAYER_PANEL_NEW;
+      const existingPanel = state.panels.find((p) => p.name === action.payload.name);
+      let nextPanelInfo = action.payload.panelInfo || {};
+
+      // lockModalFalse 플래그 처리: DetailPanel이 스택에 있거나 lock이 이미 true면 modal=true 업데이트를 차단
+      if (isPlayerPanel && existingPanel) {
+        const lockFlag =
+          existingPanel.panelInfo?.lockModalFalse === true || nextPanelInfo.lockModalFalse === true;
+
+        // unlock 명시 시 그대로 진행
+        if (nextPanelInfo.lockModalFalse === false) {
+          // do nothing
+        } else if (lockFlag && nextPanelInfo.modal === true) {
+          nextPanelInfo = {
+            ...nextPanelInfo,
+            modal: false,
+            modalContainerId: undefined,
+            lockModalFalse: true,
+            modalStyle: undefined,
+            modalScale: undefined,
+            shouldShrinkTo1px: false,
+            isHidden: false,
+          };
+        } else if (lockFlag && nextPanelInfo.modal === undefined && hasDetailPanel) {
+          nextPanelInfo = {
+            ...nextPanelInfo,
+            modal:
+              existingPanel.panelInfo?.modal === true ? false : existingPanel.panelInfo?.modal,
+            modalContainerId:
+              existingPanel.panelInfo?.modal === true
+                ? undefined
+                : existingPanel.panelInfo?.modalContainerId,
+            lockModalFalse: true,
+            modalStyle: existingPanel.panelInfo?.modal === true ? undefined : nextPanelInfo.modalStyle,
+            modalScale: existingPanel.panelInfo?.modal === true ? undefined : nextPanelInfo.modalScale,
+            shouldShrinkTo1px: false,
+            isHidden: false,
+          };
+        } else if (hasDetailPanel && nextPanelInfo.modal === true) {
+          // DetailPanel 존재 시 modal=true 업데이트 차단
+          nextPanelInfo = {
+            ...nextPanelInfo,
+            modal: false,
+            modalContainerId: undefined,
+            modalStyle: undefined,
+            modalScale: undefined,
+            shouldShrinkTo1px: false,
+            isHidden: false,
+          };
+        }
+      }
       // 배열의 끝에서부터 시작하여 조건에 맞는 마지막 인덱스 찾기
       for (let i = state.panels.length - 1; i >= 0; i--) {
         if (state.panels[i].name === action.payload.name) {
@@ -143,7 +197,7 @@ export const panelsReducer = (state = initialState, action) => {
         index === lastIndex
           ? {
               ...panel,
-              panelInfo: { ...panel.panelInfo, ...action.payload.panelInfo },
+              panelInfo: { ...panel.panelInfo, ...nextPanelInfo },
             }
           : panel
       );
diff --git a/com.twin.app.shoptime/src/views/DetailPanel/DetailPanel.jsx b/com.twin.app.shoptime/src/views/DetailPanel/DetailPanel.jsx
index 78034238..630f29dd 100644
--- a/com.twin.app.shoptime/src/views/DetailPanel/DetailPanel.jsx
+++ b/com.twin.app.shoptime/src/views/DetailPanel/DetailPanel.jsx
@@ -331,6 +331,7 @@ export default function DetailPanel({ panelInfo, isOnTop, spotlightId }) {
                 detailPanelClosedAt: Date.now(), // ✅ 시점 기록
                 detailPanelClosedFromSource: sourceMenu, // ✅ 출처
                 lastFocusedTargetId: panelInfo?.lastFocusedTargetId, // ✅ 포커스 복원 타겟 전달
+                lockModalFalse: false, // Detail 종료 시 lock 해제
               },
             })
           );
@@ -1117,6 +1118,24 @@ export default function DetailPanel({ panelInfo, isOnTop, spotlightId }) {
       dispatch(finishVideoPreview());
     } else if (hasPlayerPanel && launchedFromPlayer) {
       console.log('[DetailPanel] PlayerPanel modal=true detected - launched from Player, skip finishVideoPreview');
+
+      // Detail 동안 modal=true로 바뀌지 않도록 lockModalFalse 설정
+      const playerPanelEntry = panels.find(
+        (p) => p.name === panel_names.PLAYER_PANEL || p.name === panel_names.PLAYER_PANEL_NEW
+      );
+      if (playerPanelEntry?.panelInfo?.modal === true) {
+        dispatch(
+          updatePanel({
+            name: playerPanelEntry.name,
+            panelInfo: {
+              ...playerPanelEntry.panelInfo,
+              modal: false,
+              modalContainerId: undefined,
+              lockModalFalse: true,
+            },
+          })
+        );
+      }
     }
   }, [panels, dispatch, panelInfo?.fromPlayer, panelInfo?.sourcePanel]);
 
diff --git a/com.twin.app.shoptime/src/views/HomePanel/HomeBanner/HomeBanner.jsx b/com.twin.app.shoptime/src/views/HomePanel/HomeBanner/HomeBanner.jsx
index dc3723a9..40141919 100644
--- a/com.twin.app.shoptime/src/views/HomePanel/HomeBanner/HomeBanner.jsx
+++ b/com.twin.app.shoptime/src/views/HomePanel/HomeBanner/HomeBanner.jsx
@@ -53,6 +53,7 @@ export default function HomeBanner({
   const bannerDataList = useSelector((state) => state.home.bannerData?.bannerInfos);
 
   const popupVisible = useSelector((state) => state.common.popup.popupVisible);
+  const panels = useSelector((state) => state.panels.panels);
   // 🔽 useFocusHistory - 경량화된 범용 포커스 히스토리
   const focusHistory = useFocusHistory({
     enableLogging: true,
@@ -163,7 +164,10 @@ export default function HomeBanner({
       videoData = targetBannerData.bannerDetailInfos?.[0];
     }
 
-    if (videoData && (videoData.shptmBanrTpNm === 'LIVE' || videoData.shptmBanrTpNm === 'VOD')) {
+    // DetailPanel이 떠 있는 동안에는 배너 자동 재생을 스킵 (PlayerPanel 모달 재설정 방지)
+    const hasDetailPanel = panels.some((p) => p.name === panel_names.DETAIL_PANEL);
+
+    if (!hasDetailPanel && videoData && (videoData.shptmBanrTpNm === 'LIVE' || videoData.shptmBanrTpNm === 'VOD')) {
       console.log('[HomeBanner] 초기 비디오 자동 재생:', defaultFocus);
 
       dispatch(
@@ -175,12 +179,13 @@ export default function HomeBanner({
           shptmBanrTpNm: videoData.shptmBanrTpNm,
           lgCatCd: videoData.lgCatCd,
           chanId: videoData.brdcChnlId,
+          // 기본: 배너는 modal=true로 재생
           modal: true,
           modalContainerId: defaultFocus,
         })
       );
     }
-  }, [bannerDataList, defaultFocus, dispatch]);
+  }, [bannerDataList, defaultFocus, dispatch, panels]);
 
   const renderItem = useCallback(
     (index, isHorizontal) => {