diff --git a/client/packages/lowcoder/src/comps/controls/codeControl.tsx b/client/packages/lowcoder/src/comps/controls/codeControl.tsx
index 2ae75d7a0..7daa097d5 100644
--- a/client/packages/lowcoder/src/comps/controls/codeControl.tsx
+++ b/client/packages/lowcoder/src/comps/controls/codeControl.tsx
@@ -189,6 +189,7 @@ export function codeControl<
       const cardContent = params.disableCard
         ? ""
         : getCardContent(this.unevaledValue, this.valueAndMsg, codeControlParams);
+      const { key, ...restParams } = params;
       return (
         <EditorContext.Consumer>
           {(editorState) => (
@@ -197,7 +198,8 @@ export function codeControl<
                 <>
                   <Suspense fallback={null}>
                     <CodeEditor
-                      {...params}
+                      key={key}
+                      {...restParams}
                       bordered
                       value={this.unevaledValue}
                       codeType={codeType}
diff --git a/client/packages/lowcoder/src/pages/ApplicationV2/FolderView.tsx b/client/packages/lowcoder/src/pages/ApplicationV2/FolderView.tsx
index 887a74cc1..701685711 100644
--- a/client/packages/lowcoder/src/pages/ApplicationV2/FolderView.tsx
+++ b/client/packages/lowcoder/src/pages/ApplicationV2/FolderView.tsx
@@ -1,7 +1,8 @@
 import { useDispatch, useSelector } from "react-redux";
 import { useParams } from "react-router-dom";
 import { HomeBreadcrumbType, HomeLayout } from "./HomeLayout";
-import {useEffect, useState} from "react";
+import { useEffect, useState } from "react";
+import { useDebouncedValue } from "util/hooks";
 import {ApplicationCategoriesEnum, ApplicationMeta, FolderMeta} from "../../constants/applicationConstants";
 import { buildFolderUrl } from "../../constants/routesURL";
 import { folderElementsSelector, foldersSelector } from "../../redux/selectors/folderSelector";
@@ -100,13 +101,12 @@ export function FolderView() {
         }, [searchValues]
     );
 
-    useEffect(()=> {
-        const timer = setTimeout(() => {
-            if (searchValue.length > 2 || searchValue === "")
-                setSearchValues(searchValue)
-        }, 500);
-        return () => clearTimeout(timer);
-    }, [searchValue])
+    const debouncedSearchValue = useDebouncedValue(searchValue, 500);
+
+    useEffect(() => {
+        if (debouncedSearchValue.trim().length > 0 || debouncedSearchValue === "")
+            setSearchValues(debouncedSearchValue);
+    }, [debouncedSearchValue]);
 
   return (
     <>
diff --git a/client/packages/lowcoder/src/pages/ApplicationV2/HomeView.tsx b/client/packages/lowcoder/src/pages/ApplicationV2/HomeView.tsx
index 3a435a6b8..a49355541 100644
--- a/client/packages/lowcoder/src/pages/ApplicationV2/HomeView.tsx
+++ b/client/packages/lowcoder/src/pages/ApplicationV2/HomeView.tsx
@@ -3,7 +3,8 @@ import { HomeLayout } from "./HomeLayout";
 import { getUser } from "../../redux/selectors/usersSelectors";
 import { Helmet } from "react-helmet";
 import { trans } from "i18n";
-import {useState, useEffect } from "react";
+import { useState, useEffect } from "react";
+import { useDebouncedValue } from "util/hooks";
 import {fetchFolderElements} from "@lowcoder-ee/util/pagination/axios";
 import {ApplicationCategoriesEnum, ApplicationMeta, FolderMeta} from "@lowcoder-ee/constants/applicationConstants";
 import {ApplicationPaginationType} from "@lowcoder-ee/util/pagination/type";
@@ -53,13 +54,13 @@ export function HomeView() {
         }, [searchValues]
     );
 
-    useEffect(()=> {
-        const timer = setTimeout(() => {
-            if (searchValue.length > 2 || searchValue === "")
-                setSearchValues(searchValue)
-        }, 500);
-        return () => clearTimeout(timer);
-    }, [searchValue])
+    const debouncedSearchValue = useDebouncedValue(searchValue, 500);
+
+    useEffect(() => {
+        if (debouncedSearchValue.trim().length > 0 || debouncedSearchValue === "") {
+            setSearchValues(debouncedSearchValue);
+        }
+    }, [debouncedSearchValue]);
 
   const user = useSelector(getUser);
 
diff --git a/client/packages/lowcoder/src/pages/ApplicationV2/TrashView.tsx b/client/packages/lowcoder/src/pages/ApplicationV2/TrashView.tsx
index 410a2632f..3b6e84390 100644
--- a/client/packages/lowcoder/src/pages/ApplicationV2/TrashView.tsx
+++ b/client/packages/lowcoder/src/pages/ApplicationV2/TrashView.tsx
@@ -1,6 +1,7 @@
 import { HomeLayout } from "./HomeLayout";
 import { TRASH_URL } from "../../constants/routesURL";
-import {useEffect, useState} from "react";
+import { useEffect, useState } from "react";
+import { useDebouncedValue } from "util/hooks";
 import { trans } from "../../i18n";
 import { Helmet } from "react-helmet";
 import {fetchApplicationElements} from "@lowcoder-ee/util/pagination/axios";
@@ -46,14 +47,13 @@ export function TrashView() {
         }, [searchValues]
     );
 
-    //debouncing
-    useEffect(()=> {
-        const timer = setTimeout(() => {
-            if (searchValue.length > 2 || searchValue === "")
-                setSearchValues(searchValue)
-        }, 500);
-        return () => clearTimeout(timer);
-    }, [searchValue])
+    const debouncedSearchValue = useDebouncedValue(searchValue, 500);
+
+    useEffect(() => {
+        if (debouncedSearchValue.trim().length > 0 || debouncedSearchValue === "") {
+            setSearchValues(debouncedSearchValue);
+        }
+    }, [debouncedSearchValue]);
 
   return (
     <>
diff --git a/client/packages/lowcoder/src/pages/ApplicationV2/index.tsx b/client/packages/lowcoder/src/pages/ApplicationV2/index.tsx
index 14bf9df2e..20ba7f5ab 100644
--- a/client/packages/lowcoder/src/pages/ApplicationV2/index.tsx
+++ b/client/packages/lowcoder/src/pages/ApplicationV2/index.tsx
@@ -176,6 +176,7 @@ export default function ApplicationHome() {
                     routePath: ALL_APPLICATIONS_URL,
                     routeComp: HomeView,
                     icon: ({ selected, ...otherProps }) => selected ? <AppsIcon {...otherProps} width={"24px"}/> : <AppsIcon {...otherProps} width={"24px"}/>,
+                    onSelected: (_, currentPath) => currentPath === ALL_APPLICATIONS_URL || currentPath.startsWith("/folder"),
                   },
                 ],
               },
diff --git a/client/packages/lowcoder/src/pages/datasource/datasourceList.tsx b/client/packages/lowcoder/src/pages/datasource/datasourceList.tsx
index 61eb621b2..cc83e64e6 100644
--- a/client/packages/lowcoder/src/pages/datasource/datasourceList.tsx
+++ b/client/packages/lowcoder/src/pages/datasource/datasourceList.tsx
@@ -1,6 +1,7 @@
 import styled from "styled-components";
 import { EditPopover, PointIcon, Search, TacoButton } from "lowcoder-design";
-import {useEffect, useState} from "react";
+import { useState, useEffect } from "react";
+import { useDebouncedValue } from "util/hooks";
 import { useDispatch, useSelector } from "react-redux";
 import { getDataSourceTypesMap } from "../../redux/selectors/datasourceSelectors";
 import { deleteDatasource } from "../../redux/reduxActions/datasourceActions";
@@ -124,13 +125,13 @@ export const DatasourceList = () => {
   const [pageSize, setPageSize] = useState(10);
   const [paginationLoading, setPaginationLoading] = useState(false);
 
-  useEffect(()=> {
-    const timer = setTimeout(() => {
-      if (searchValue.length > 2 || searchValue === "")
-        setSearchValues(searchValue)
-    }, 500);
-    return () => clearTimeout(timer);
-  }, [searchValue])
+  const debouncedSearchValue = useDebouncedValue(searchValue, 500);
+
+  useEffect(() => {
+    if (debouncedSearchValue.trim().length > 0 || debouncedSearchValue === "") {
+      setSearchValues(debouncedSearchValue);
+    }
+  }, [debouncedSearchValue]);
 
   useEffect( () => {
     setPaginationLoading(true);
diff --git a/client/packages/lowcoder/src/pages/queryLibrary/LeftNav.tsx b/client/packages/lowcoder/src/pages/queryLibrary/LeftNav.tsx
index 84bdade67..6df81dd6b 100644
--- a/client/packages/lowcoder/src/pages/queryLibrary/LeftNav.tsx
+++ b/client/packages/lowcoder/src/pages/queryLibrary/LeftNav.tsx
@@ -1,4 +1,5 @@
-import {useEffect, useState} from "react";
+import { useEffect, useState } from "react";
+import { useDebouncedValue } from "util/hooks";
 import styled, { css } from "styled-components";
 import {
   BluePlusIcon,
@@ -174,14 +175,13 @@ export const LeftNav = (props: {
   const [searchValue, setSearchValue] = useState("");
   const datasourceTypes = useSelector(getDataSourceTypesMap);
 
-  useEffect(()=> {
-    const timer = setTimeout(() => {
-      if (searchValue.length > 2 || searchValue === "")
-        setSearchValues(searchValue)
-    }, 500);
-    return () => clearTimeout(timer);
-  }, [searchValue])
+  const debouncedSearchValue = useDebouncedValue(searchValue, 500);
 
+  useEffect(() => {
+    if (debouncedSearchValue.trim().length > 0 || debouncedSearchValue === "") {
+      setSearchValues(debouncedSearchValue);
+    }
+  }, [debouncedSearchValue]);
 
 
   return (
diff --git a/client/packages/lowcoder/src/pages/setting/advanced/AdvancedSetting.tsx b/client/packages/lowcoder/src/pages/setting/advanced/AdvancedSetting.tsx
index a9998fa5d..5a85dd6e5 100644
--- a/client/packages/lowcoder/src/pages/setting/advanced/AdvancedSetting.tsx
+++ b/client/packages/lowcoder/src/pages/setting/advanced/AdvancedSetting.tsx
@@ -96,9 +96,18 @@ export function AdvancedSetting() {
   }, [currentUser.currentOrgId])
 
   useEffect(() => {
-    dispatch(fetchCommonSettings({ orgId: currentUser.currentOrgId }));
-    dispatch(fetchAllApplications({}));
-  }, [currentUser.currentOrgId, dispatch]);
+    // Only fetch common settings if not already loaded
+    if (Object.keys(commonSettings).length === 0) {
+      dispatch(fetchCommonSettings({ orgId: currentUser.currentOrgId }));
+    }
+  }, [currentUser.currentOrgId, dispatch, commonSettings]);
+
+  // Lazy load applications only when dropdown is opened
+  const handleDropdownOpen = () => {
+    if (appList.length === 0) {
+      dispatch(fetchAllApplications({}));
+    }
+  };
 
   useEffect(() => {
     setSettings(commonSettings);
@@ -110,9 +119,7 @@ export function AdvancedSetting() {
     }
   }, [canLeave]);
 
-  useEffect(() => {
-    dispatch(fetchCommonSettings({ orgId: currentUser.currentOrgId }));
-  }, [currentUser.currentOrgId, dispatch]);
+
 
   const handleSave = (key: keyof typeof settings, onSuccess?: () => void) => {
     return (value?: any) => {
@@ -178,6 +185,9 @@ export function AdvancedSetting() {
             onChange={(value: string) => {
               setSettings((v) => ({ ...v, defaultHomePage: value }));
             }}
+            onDropdownVisibleChange={(open) => {
+              if (open) handleDropdownOpen();
+            }}
             options={appListOptions}
             filterOption={(input, option) => (option?.label as string).includes(input)}
           />
diff --git a/client/packages/lowcoder/src/util/hooks.ts b/client/packages/lowcoder/src/util/hooks.ts
index 9c9b7777c..796ba7eed 100644
--- a/client/packages/lowcoder/src/util/hooks.ts
+++ b/client/packages/lowcoder/src/util/hooks.ts
@@ -29,6 +29,7 @@ import { constantColors } from "components/colorSelect/colorUtils";
 import { AppState } from "@lowcoder-ee/redux/reducers";
 import { getOrgUserStats } from "@lowcoder-ee/redux/selectors/orgSelectors";
 import { fetchGroupsAction } from "@lowcoder-ee/redux/reduxActions/orgActions";
+import debounce from "lodash/debounce";
 
 export const ForceViewModeContext = React.createContext<boolean>(false);
 
@@ -282,3 +283,21 @@ export const useOrgUserCount = (orgId: string) => {
 
   return userCount;
 };
+
+/**
+ * Returns a debounced version of the incoming value that only updates
+ */
+export function useDebouncedValue<T>(value: T, delay = 500): T {
+  const [debouncedValue, setDebouncedValue] = useState<T>(value);
+
+  const updater = useMemo(() => debounce(setDebouncedValue, delay), [delay]);
+
+  useEffect(() => {
+    updater(value);
+    return () => {
+      updater.cancel();
+    };
+  }, [value, updater]);
+
+  return debouncedValue;
+}