diff --git a/src/App.js b/src/App.js
index 32a52be..d753e68 100644
--- a/src/App.js
+++ b/src/App.js
@@ -17,7 +17,7 @@ export default function App() {
   const [notificationApi, notificationContextHolder] =
     notification.useNotification();
   const { userSession, setUserSession } = UseUserSession();
-  const [isWebSocketReady, setIsWebSocketReady] = useState(true);
+  const [isWebSocketReady, setIsWebSocketReady] = useState(false);
 
   if (!userSession) {
     return <Login />;
diff --git a/src/Components/AppRoutes/index.js b/src/Components/AppRoutes/index.js
index 023d371..6ded517 100644
--- a/src/Components/AppRoutes/index.js
+++ b/src/Components/AppRoutes/index.js
@@ -48,17 +48,6 @@ function SuspenseFallback({ children }) {
 export default function AppRoutes() {
   const appContext = useAppContext();
 
-  /*
-   <Route
-        path={Constants.ROUTE_PATHS.GROUP_TASKS_VIEW + ":paramGroupTaskId"}
-        element={
-          <SuspenseFallback>
-            <GroupTasks isGroupTasksViewModalOpen={true} />
-          </SuspenseFallback>
-        }
-      />
-  */
-
   console.info("appRoutes");
 
   return (
@@ -169,7 +158,7 @@ export default function AppRoutes() {
         Constants.PERMISSIONS.SCANNER.USE_SCANNERS
       ) && (
         <Route
-          path="/scanners"
+          path={Constants.ROUTE_PATHS.SCANNERS}
           element={
             <SuspenseFallback>
               <Scanners />
@@ -179,7 +168,7 @@ export default function AppRoutes() {
       )}
 
       <Route
-        path="/users"
+        path={Constants.ROUTE_PATHS.USERS}
         element={
           <SuspenseFallback>
             <AllUsers />
@@ -188,7 +177,7 @@ export default function AppRoutes() {
       />
 
       <Route
-        path="/user-profile"
+        path={Constants.ROUTE_PATHS.USER_PROFILE}
         element={
           <SuspenseFallback>
             <UserProfile />
@@ -204,7 +193,7 @@ export default function AppRoutes() {
         Constants.PERMISSIONS.ADMIN_AREA.ROLES.MOVE_ROLE_UP_DOWN
       ) && (
         <Route
-          path="/admin-area/roles"
+          path={Constants.ROUTE_PATHS.ADMIN_AREA_ROLES}
           element={
             <SuspenseFallback>
               <AdminAreaRoles />
@@ -218,7 +207,7 @@ export default function AppRoutes() {
         Constants.PERMISSIONS.ADMIN_AREA.LOGS
       ) && (
         <Route
-          path="/admin-area/logs"
+          path={Constants.ROUTE_PATHS.ADMIN_AREA_LOGS}
           element={
             <SuspenseFallback>
               <AdminAreaLogs />
diff --git a/src/Components/SideMenu/index.js b/src/Components/SideMenu/index.js
index 4e996ef..7dfcdf5 100644
--- a/src/Components/SideMenu/index.js
+++ b/src/Components/SideMenu/index.js
@@ -11,7 +11,7 @@ import {
 } from "@ant-design/icons";
 import { Badge, Divider, Menu } from "antd";
 import Sider from "antd/es/layout/Sider";
-import { useEffect, useState } from "react";
+import { useEffect, useRef, useState } from "react";
 import { useLocation, useNavigate } from "react-router-dom";
 import PropTypes from "prop-types";
 import { Constants, hasOnePermission, hasPermission } from "../../utils";
@@ -19,6 +19,8 @@ import { useTranslation } from "react-i18next";
 import { MyUserAvatar } from "../MyAvatar";
 import { useSideBarContext } from "../../Contexts/SideBarContext";
 import { useAppContext } from "../../Contexts/AppContext";
+import { useWebSocketContext } from "../../Contexts/WebSocketContext";
+import { SentMessagesCommands } from "../../Handlers/WebSocketMessageHandler";
 
 export default function SideMenu({
   userSession,
@@ -27,12 +29,12 @@ export default function SideMenu({
   setIsSideMenuCollapsed,
 }) {
   const appContext = useAppContext();
+  const webSocketContext = useWebSocketContext();
   const sideBarContext = useSideBarContext();
   const location = useLocation();
   const [selectedKeys, setSelectedKeys] = useState("/");
   const { t } = useTranslation();
-
-  useEffect(() => setSelectedKeys(location.pathname), [location.pathname]);
+  const lastSubscribedTopic = useRef("");
 
   const navigate = useNavigate();
 
@@ -70,7 +72,7 @@ export default function SideMenu({
       items.push({
         label: t("sideMenu.equipmentDocumentation"),
         icon: <BookOutlined />,
-        key: "/equipment-documentation",
+        key: Constants.ROUTE_PATHS.EQUIPMENT_DOCUMENTATION,
       });
     }
 
@@ -148,7 +150,7 @@ export default function SideMenu({
         adminArea.children.push({
           label: t("sideMenu.adminArea.roles"),
           icon: <UsergroupAddOutlined />,
-          key: "/admin-area/roles",
+          key: Constants.ROUTE_PATHS.ADMIN_AREA_ROLES,
         });
       }
 
@@ -161,7 +163,7 @@ export default function SideMenu({
         adminArea.children.push({
           label: t("sideMenu.adminArea.logs"),
           icon: <FileTextOutlined />,
-          key: "/admin-area/logs",
+          key: Constants.ROUTE_PATHS.ADMIN_AREA_LOGS,
         });
       }
 
@@ -184,7 +186,7 @@ export default function SideMenu({
       items.push({
         icon: <ScanOutlined />,
         label: getCurrentUsedScannerName(),
-        key: "/scanners",
+        key: Constants.ROUTE_PATHS.SCANNERS,
       });
     }
 
@@ -201,12 +203,12 @@ export default function SideMenu({
             }`}
           />
         ),
-        key: "/users",
+        key: Constants.ROUTE_PATHS.USERS,
       },
       {
         label: ` ${sideBarContext.username}`,
         icon: <MyUserAvatar avatar={sideBarContext.avatar} />,
-        key: "/user-profile",
+        key: Constants.ROUTE_PATHS.USER_PROFILE,
       },
       {
         label: t("sideMenu.logout"),
@@ -230,6 +232,22 @@ export default function SideMenu({
     return items;
   };
 
+  useEffect(() => {
+    console.log("useeffect side menu");
+  }, []);
+
+  useEffect(() => {
+    console.log("useeffect side menu 2");
+
+    setSelectedKeys(location.pathname);
+
+    lastSubscribedTopic.current = location.pathname;
+
+    webSocketContext.SendSocketMessage(SentMessagesCommands.SubscribeToTopic, {
+      topic: location.pathname,
+    });
+  }, [location.pathname]);
+
   return (
     <Sider
       theme="light"
@@ -274,7 +292,6 @@ export default function SideMenu({
             theme="light"
             selectedKeys={[selectedKeys]}
             items={getFirstMenuItems()}
-            openKeys={["/admin-area", "/group-tasks"]}
             defaultOpenKeys={["/admin-area", "/group-tasks"]}
           />
         </div>
diff --git a/src/Contexts/WebSocketContext.js b/src/Contexts/WebSocketContext.js
index b233aa3..f5977ab 100644
--- a/src/Contexts/WebSocketContext.js
+++ b/src/Contexts/WebSocketContext.js
@@ -2,7 +2,6 @@ import { createContext, useContext, useEffect, useRef } from "react";
 import { Constants, myFetch } from "../utils";
 import { useSideBarContext } from "./SideBarContext";
 import { useAppContext } from "./AppContext";
-import { message } from "antd";
 import { handleWebSocketMessage } from "../Handlers/WebSocketMessageHandler";
 import { useGroupTasksContext } from "./GroupTasksContext";
 import { useNavigate } from "react-router-dom";
@@ -23,6 +22,7 @@ export default function WebSocketProvider({
   notificationApi,
 }) {
   const ws = useRef(null);
+  const wsMessageCache = useRef([]);
   const navigate = useNavigate();
   const appContext = useAppContext();
   const sideBarContext = useSideBarContext();
@@ -49,6 +49,15 @@ export default function WebSocketProvider({
         sideBarContext.setAvatar(data.Avatar);
         sideBarContext.setAvailableCategoryGroups(data.AvailableCategoryGroups);
       });
+
+      if (wsMessageCache.current.length > 0) {
+        // send cached messages
+        wsMessageCache.current.forEach((message) => {
+          ws.current.send(JSON.stringify(message));
+        });
+
+        wsMessageCache.current = [];
+      }
     };
 
     ws.current.onmessage = (event) => {
@@ -88,7 +97,7 @@ export default function WebSocketProvider({
   };
 
   const SendSocketMessage = (cmd, body) => {
-    if (isWebSocketReady) {
+    if (isWebSocketReady && ws.current !== null) {
       ws.current.send(JSON.stringify({ Cmd: cmd, Body: body }));
     } else {
       /*notificationApi["error"]({
@@ -96,7 +105,9 @@ export default function WebSocketProvider({
         description: `Please check your internet connection`,
       }); */
 
-      message.error(`Websocket is not ready`);
+      wsMessageCache.current.push({ Cmd: cmd, Body: body });
+
+      // message.error(`Websocket is not ready`);
     }
   };
 
diff --git a/src/Handlers/WebSocketMessageHandler.js b/src/Handlers/WebSocketMessageHandler.js
index 864ccd3..198207f 100644
--- a/src/Handlers/WebSocketMessageHandler.js
+++ b/src/Handlers/WebSocketMessageHandler.js
@@ -43,6 +43,7 @@ export const ReceivedMessagesCommands = {
   InstallingGlobalPythonPackages: 36,
   InstallingGlobalPythonPackagesFailed: 37,
   InstallingGlobalPythonPackagesFinished: 38,
+  UpdateUsers: 39,
 };
 
 // commands sent to the backend server
@@ -69,6 +70,7 @@ export const SentMessagesCommands = {
   DeleteUserApiKey: 20,
   GroupTasksInstallPythonPackages: 21,
   GroupTasksInstallGlobalPythonPackages: 22,
+  SubscribeToTopic: 23,
 };
 
 export function handleWebSocketMessage(
@@ -89,20 +91,7 @@ export function handleWebSocketMessage(
 
   switch (cmd) {
     case ReceivedMessagesCommands.UpdateConnectedUsers:
-      sideBarContext.setConnectedUsers(body.WebSocketUsersCount);
-
-      usersContext.setUsers((arr) => {
-        const newArr = [...arr];
-
-        const arrIndex = arr.findIndex((arr1) => arr1.Id === body.UserId);
-
-        if (arrIndex !== -1) {
-          newArr[arrIndex].ConnectionStatus = body.ConnectionStatus;
-          newArr[arrIndex].LastOnline = body.LastOnline;
-        }
-
-        return newArr;
-      });
+      sideBarContext.setConnectedUsers(body);
       break;
     case ReceivedMessagesCommands.NewGroupTaskStarted:
       groupTasksContext.setGroupTasks((arr) => [...arr, body]);
@@ -955,6 +944,20 @@ export function handleWebSocketMessage(
         description: `You can now continue with the work`,
       });
       break;
+    case ReceivedMessagesCommands.UpdateUsers:
+      usersContext.setUsers((arr) => {
+        const newArr = [...arr];
+
+        const arrIndex = arr.findIndex((arr1) => arr1.Id === body.UserId);
+
+        if (arrIndex !== -1) {
+          newArr[arrIndex].ConnectionStatus = body.ConnectionStatus;
+          newArr[arrIndex].LastOnline = body.LastOnline;
+        }
+
+        return newArr;
+      });
+      break;
     default:
       console.error("unknown command", cmd);
       break;
diff --git a/src/Pages/AdminArea/Roles/index.js b/src/Pages/AdminArea/Roles/index.js
index b61e83d..0dd9ee9 100644
--- a/src/Pages/AdminArea/Roles/index.js
+++ b/src/Pages/AdminArea/Roles/index.js
@@ -12,12 +12,7 @@ import {
   Typography,
   notification,
 } from "antd";
-import {
-  Constants,
-  SentMessagesCommands,
-  hasPermission,
-  myFetch,
-} from "../../../utils";
+import { Constants, hasPermission, myFetch } from "../../../utils";
 import {
   ArrowDownOutlined,
   ArrowUpOutlined,
@@ -34,6 +29,7 @@ import { MyAvatar } from "../../../Components/MyAvatar";
 import { useAdminAreaRolesContext } from "../../../Contexts/AdminAreaRolesContext";
 import { useWebSocketContext } from "../../../Contexts/WebSocketContext";
 import { useAppContext } from "../../../Contexts/AppContext";
+import { SentMessagesCommands } from "../../../Handlers/WebSocketMessageHandler";
 
 const { useBreakpoint } = Grid;
 
diff --git a/src/Pages/AllUsers/CreateUserModal.js b/src/Pages/AllUsers/CreateUserModal.js
index 475dbd2..f7e2a3b 100644
--- a/src/Pages/AllUsers/CreateUserModal.js
+++ b/src/Pages/AllUsers/CreateUserModal.js
@@ -1,15 +1,11 @@
 import { Form, Input, Select } from "antd";
 import Modal from "antd/es/modal/Modal";
-import {
-  Constants,
-  EncodeStringToBase64,
-  SentMessagesCommands,
-  isEmailValid,
-} from "../../utils";
+import { Constants, EncodeStringToBase64, isEmailValid } from "../../utils";
 import { useState } from "react";
 import { useTranslation } from "react-i18next";
 import { useWebSocketContext } from "../../Contexts/WebSocketContext";
 import { useUsersContext } from "../../Contexts/UsersContext";
+import { SentMessagesCommands } from "../../Handlers/WebSocketMessageHandler";
 
 export default function CreateUserModal({ isModalOpen, setIsModalOpen }) {
   const webSocketContext = useWebSocketContext();
diff --git a/src/Pages/AllUsers/index.js b/src/Pages/AllUsers/index.js
index 54eec58..7c70012 100644
--- a/src/Pages/AllUsers/index.js
+++ b/src/Pages/AllUsers/index.js
@@ -11,7 +11,6 @@ import {
 import {
   Constants,
   FormatDatetime,
-  SentMessagesCommands,
   getConnectionStatusItem,
   hasOnePermission,
   hasPermission,
@@ -26,6 +25,7 @@ import { MyAvatar } from "../../Components/MyAvatar";
 import { useUsersContext } from "../../Contexts/UsersContext";
 import { useAppContext } from "../../Contexts/AppContext";
 import { useWebSocketContext } from "../../Contexts/WebSocketContext";
+import { SentMessagesCommands } from "../../Handlers/WebSocketMessageHandler";
 
 export default function AllUsers() {
   const webSocketContext = useWebSocketContext();
diff --git a/src/Pages/GroupTasks/Overview/GroupTasksTableList.js b/src/Pages/GroupTasks/Overview/GroupTasksTableList.js
index 9df060d..2f152c9 100644
--- a/src/Pages/GroupTasks/Overview/GroupTasksTableList.js
+++ b/src/Pages/GroupTasks/Overview/GroupTasksTableList.js
@@ -19,7 +19,6 @@ import {
   Constants,
   FormatDatetime,
   GetDuration,
-  SentMessagesCommands,
   hasOneXYPermission,
   hasXYPermission,
 } from "../../../utils";
@@ -27,6 +26,7 @@ import { useTranslation } from "react-i18next";
 import { MyAvatar } from "../../../Components/MyAvatar";
 import { useWebSocketContext } from "../../../Contexts/WebSocketContext";
 import { useAppContext } from "../../../Contexts/AppContext";
+import { SentMessagesCommands } from "../../../Handlers/WebSocketMessageHandler";
 
 const { useBreakpoint } = Grid;
 
diff --git a/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js b/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js
index ae1e9c2..d7f0170 100644
--- a/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js
+++ b/src/Pages/GroupTasks/Overview/GroupTasksViewModal.js
@@ -15,7 +15,6 @@ import { useNavigate, useParams } from "react-router-dom";
 import {
   Constants,
   FormatDatetime,
-  SentMessagesCommands,
   GetDuration,
   getUserId,
   GroupTasksStepsLockedAndUserUpdateInputValueRememberId,
@@ -38,6 +37,7 @@ import MyAttachments from "../../../Components/MyAttachments";
 import { useWebSocketContext } from "../../../Contexts/WebSocketContext";
 import { useGroupTasksContext } from "../../../Contexts/GroupTasksContext";
 import { useAppContext } from "../../../Contexts/AppContext";
+import { SentMessagesCommands } from "../../../Handlers/WebSocketMessageHandler";
 
 export default function GroupTasksViewModal({ isOpen }) {
   const webSocketContext = useWebSocketContext();
diff --git a/src/Pages/GroupTasks/Overview/GroupTypeSelectionModal.js b/src/Pages/GroupTasks/Overview/GroupTypeSelectionModal.js
index d7db552..71167b8 100644
--- a/src/Pages/GroupTasks/Overview/GroupTypeSelectionModal.js
+++ b/src/Pages/GroupTasks/Overview/GroupTypeSelectionModal.js
@@ -10,12 +10,13 @@ import {
   Tag,
   notification,
 } from "antd";
-import { SentMessagesCommands, GetUuid } from "../../../utils";
+import { GetUuid } from "../../../utils";
 import { InfoCircleOutlined } from "@ant-design/icons";
 import TextArea from "antd/es/input/TextArea";
 import { useTranslation } from "react-i18next";
 import { useWebSocketContext } from "../../../Contexts/WebSocketContext";
 import { useGroupTasksContext } from "../../../Contexts/GroupTasksContext";
+import { SentMessagesCommands } from "../../../Handlers/WebSocketMessageHandler";
 
 export default function GroupTypeSelectionModal({
   isOpen,
diff --git a/src/Pages/GroupTasks/Overview/index.js b/src/Pages/GroupTasks/Overview/index.js
index 195a634..69752a8 100644
--- a/src/Pages/GroupTasks/Overview/index.js
+++ b/src/Pages/GroupTasks/Overview/index.js
@@ -3,12 +3,7 @@ import { useEffect, useRef, useState } from "react";
 import GroupTasksViewModal from "./GroupTasksViewModal";
 import GroupTypeSelectionModal from "./GroupTypeSelectionModal";
 import GroupTaskTableList from "./GroupTasksTableList";
-import {
-  Constants,
-  SentMessagesCommands,
-  hasPermission,
-  myFetch,
-} from "../../../utils";
+import { Constants, hasPermission, myFetch } from "../../../utils";
 import { useTranslation } from "react-i18next";
 import { ReloadOutlined } from "@ant-design/icons";
 import { useGroupTasksContext } from "../../../Contexts/GroupTasksContext";
@@ -16,6 +11,7 @@ import { useAppContext } from "../../../Contexts/AppContext";
 import { useWebSocketContext } from "../../../Contexts/WebSocketContext";
 import { useParams } from "react-router-dom";
 import MyPagination from "../../../Components/MyPagination";
+import { SentMessagesCommands } from "../../../Handlers/WebSocketMessageHandler";
 
 export default function GroupTasks({ isGroupTasksViewModalOpen }) {
   const webSocketContext = useWebSocketContext();
@@ -31,6 +27,7 @@ export default function GroupTasks({ isGroupTasksViewModalOpen }) {
   const { t } = useTranslation();
   const [paginationPage, setPaginationPage] = useState(1);
   const totalPages = useRef(0);
+  const previousParamCategory = useRef(null);
 
   const showGroupTypeSelectionModal = (categoryGroup) => {
     setCurrentCategoryGroup(categoryGroup);
@@ -62,10 +59,24 @@ export default function GroupTasks({ isGroupTasksViewModalOpen }) {
   };
 
   useEffect(() => {
-    if (paginationPage === 1) {
-      fetchGroupTasks(1);
+    // initially previousParamCategory.current is null on first render
+    if (previousParamCategory.current === null) {
+      previousParamCategory.current = paramCategory;
+      return;
+    }
+
+    if (paramCategory !== previousParamCategory.current) {
+      previousParamCategory.current = paramCategory;
+
+      if (paginationPage === 1) {
+        // if we are on page 1, we need to fetch the new category group
+        fetchGroupTasks(1);
+      } else {
+        // if we are not on page 1, we need to reset the page to 1 and this will trigger the useEffect below
+        setPaginationPage(1);
+      }
     } else {
-      setPaginationPage(1);
+      fetchGroupTasks(paginationPage);
     }
   }, [paramCategory]);
 
diff --git a/src/Pages/UserProfile/index.js b/src/Pages/UserProfile/index.js
index dd996f5..448d594 100644
--- a/src/Pages/UserProfile/index.js
+++ b/src/Pages/UserProfile/index.js
@@ -19,7 +19,6 @@ import {
   Constants,
   EncodeStringToBase64,
   FormatDatetime,
-  SentMessagesCommands,
   getConnectionStatusItem,
   getUserSessionFromLocalStorage,
   hasPermission,
@@ -40,6 +39,7 @@ import { useUserProfileContext } from "../../Contexts/UserProfileContext";
 import { useWebSocketContext } from "../../Contexts/WebSocketContext";
 import { useAppContext } from "../../Contexts/AppContext";
 import { useSideBarContext } from "../../Contexts/SideBarContext";
+import { SentMessagesCommands } from "../../Handlers/WebSocketMessageHandler";
 
 export default function UserProfile() {
   const webSocketContext = useWebSocketContext();
diff --git a/src/utils.js b/src/utils.js
index bdc73fe..5e795a3 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -49,6 +49,11 @@ export const Constants = {
     EQUIPMENT_DOCUMENTATION_VIEW: "/equipment-documentation/",
     GROUP_TASKS: "/group-tasks/",
     GROUP_TASKS_HISTORY: "/group-tasks-history",
+    USERS: "/users",
+    SCANNERS: "/scanners",
+    USER_PROFILE: "/user-profile",
+    ADMIN_AREA_ROLES: "/admin-area/roles",
+    ADMIN_AREA_LOGS: "/admin-area/logs",
   },
   GROUP_TASKS_STATUS: {
     FINISHED: 1,
@@ -224,6 +229,7 @@ let webSocketContextPreview = {
 
 //export const WebSocketContext = createContext(webSocketContextPreview);
 
+/*
 // commands received from the backend server
 export const ReceivedMessagesCommands = {
   InitUserSocketConnection: 1,
@@ -290,7 +296,7 @@ export const SentMessagesCommands = {
   DeleteUserApiKey: 20,
   GroupTasksInstallPythonPackages: 21,
   GroupTasksInstallGlobalPythonPackages: 22,
-};
+}; */
 /*
 export function WebSocketProvider({
   children,