diff --git a/src/module/cytoscapeMap.js b/src/module/cytoscapeMap.js
index aca353e..6287c3a 100644
--- a/src/module/cytoscapeMap.js
+++ b/src/module/cytoscapeMap.js
@@ -228,6 +228,9 @@ export default function cytoscapeMap(mapData, dataLayerType, dataLayerOption, cu
 
   const cytoscapeStore = CytoscapeStore();
   cy.ready(() => {
+    if (rank === 'TB') {
+      return; // early return; only handle 'LR' (horizontal) case
+    }
     cytoscapeStore.loadPositionsFromStorage();
     localStorage.getItem(SAVE_KEY_NAME) && console.log(JSON.parse(localStorage.getItem(SAVE_KEY_NAME)));
     // 判斷localStorage是否儲存過拜訪資訊