diff --git a/src/components/offline-device-tree-modal.vue b/src/components/offline-device-tree-modal.vue
index 6610c88..7b3c6b3 100644
--- a/src/components/offline-device-tree-modal.vue
+++ b/src/components/offline-device-tree-modal.vue
@@ -51,12 +51,9 @@ watch(show, (newValue) => {
 
 const searchPattern = ref('');
 const searchFilter: (pattern: string, node: TreeOption) => boolean = (pattern, node) => {
-  if (node.children) {
-    return node.children.some((child) => searchFilter(pattern, child));
-  }
   const device = node['device'] as NdmDeviceVO;
   const { name, ipAddress } = device;
-  return name?.includes(pattern) || ipAddress?.includes(pattern);
+  return (name ?? '').includes(pattern) || (ipAddress ?? '').includes(pattern);
 };
 
 const offlineDeviceCount = computed(() => {
@@ -89,6 +86,8 @@ const nodeProps = ({ option }: { option: TreeOption }) => {
   return {
     ondblclick: () => {
       if (option.isLeaf) {
+        const queryControlStore = useQueryControlStore();
+        queryControlStore.enablePolling();
         const device = option['device'] as NdmDeviceVO;
         router.push({
           path: '/device',