diff --git a/flutter/lib/desktop/pages/connection_tab_page.dart b/flutter/lib/desktop/pages/connection_tab_page.dart
index 8d18b2f24..69c10ebff 100644
--- a/flutter/lib/desktop/pages/connection_tab_page.dart
+++ b/flutter/lib/desktop/pages/connection_tab_page.dart
@@ -2,9 +2,13 @@ import 'dart:convert';
 import 'dart:math';
 
 import 'package:flutter/material.dart';
+import 'package:flutter_hbb/common.dart';
 import 'package:flutter_hbb/desktop/pages/remote_page.dart';
 import 'package:flutter_hbb/desktop/widgets/titlebar_widget.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
+import 'package:get/get.dart';
+
+import '../../models/model.dart';
 
 class ConnectionTabPage extends StatefulWidget {
   final Map<String, dynamic> params;
@@ -51,6 +55,15 @@ class _ConnectionTabPageState extends State<ConnectionTabPage>
             });
           }
         });
+      } else if (call.method == "onDestroy") {
+        print("executing onDestroy hook, closing ${connectionIds}");
+        connectionIds.forEach((id) {
+          final tag = '${id}';
+          ffi(tag).close().then((_) {
+            Get.delete<FFI>(tag: tag);
+          });
+        });
+        Get.back();
       }
     });
   }
diff --git a/flutter/lib/desktop/pages/file_manager_tab_page.dart b/flutter/lib/desktop/pages/file_manager_tab_page.dart
index af65c86df..6c9f199b7 100644
--- a/flutter/lib/desktop/pages/file_manager_tab_page.dart
+++ b/flutter/lib/desktop/pages/file_manager_tab_page.dart
@@ -2,8 +2,10 @@ import 'dart:convert';
 import 'dart:math';
 
 import 'package:flutter/material.dart';
+import 'package:flutter_hbb/common.dart';
 import 'package:flutter_hbb/desktop/pages/file_manager_page.dart';
 import 'package:flutter_hbb/desktop/widgets/titlebar_widget.dart';
+import 'package:flutter_hbb/models/model.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
 import 'package:get/get.dart';
 
@@ -21,7 +23,7 @@ class _FileManagerTabPageState extends State<FileManagerTabPage>
     with SingleTickerProviderStateMixin {
   // refactor List<int> when using multi-tab
   // this singleton is only for test
-  List<String> connectionIds = List.empty(growable: true);
+  var connectionIds = List<String>.empty(growable: true).obs;
   var initialIndex = 0.obs;
 
   _FileManagerTabPageState(Map<String, dynamic> params) {
@@ -47,6 +49,15 @@ class _FileManagerTabPageState extends State<FileManagerTabPage>
           connectionIds.add(id);
           initialIndex.value = connectionIds.length - 1;
         }
+      } else if (call.method == "onDestroy") {
+        print("executing onDestroy hook, closing ${connectionIds}");
+        connectionIds.forEach((id) {
+          final tag = 'ft_${id}';
+          ffi(tag).close().then((_) {
+            Get.delete<FFI>(tag: tag);
+          });
+        });
+        Get.back();
       }
     });
   }
diff --git a/flutter/lib/models/model.dart b/flutter/lib/models/model.dart
index 8d4737c5a..e5e521035 100644
--- a/flutter/lib/models/model.dart
+++ b/flutter/lib/models/model.dart
@@ -924,6 +924,7 @@ class FFI {
       imageModel._id = id;
       cursorModel.id = id;
     }
+    id = isFileTransfer ? 'ft_${id}' : id;
     final stream = bind.sessionConnect(id: id, isFileTransfer: isFileTransfer);
     final cb = ffiModel.startEventListener(id);
     () async {
@@ -954,10 +955,10 @@ class FFI {
   }
 
   /// Close the remote session.
-  void close() {
+  Future<void> close() async {
     chatModel.close();
     if (imageModel.image != null && !isWebDesktop) {
-      savePreference(id, cursorModel.x, cursorModel.y, canvasModel.x,
+      await savePreference(id, cursorModel.x, cursorModel.y, canvasModel.x,
           canvasModel.y, canvasModel.scale, ffiModel.pi.currentDisplay);
     }
     bind.sessionClose(id: id);
@@ -1085,8 +1086,8 @@ class PeerInfo {
   List<Display> displays = [];
 }
 
-void savePreference(String id, double xCursor, double yCursor, double xCanvas,
-    double yCanvas, double scale, int currentDisplay) async {
+Future<void> savePreference(String id, double xCursor, double yCursor,
+    double xCanvas, double yCanvas, double scale, int currentDisplay) async {
   SharedPreferences prefs = await SharedPreferences.getInstance();
   final p = Map<String, dynamic>();
   p['xCursor'] = xCursor;
diff --git a/flutter/pubspec.yaml b/flutter/pubspec.yaml
index 3b6a51a90..4bbc2f3c5 100644
--- a/flutter/pubspec.yaml
+++ b/flutter/pubspec.yaml
@@ -62,7 +62,7 @@ dependencies:
     desktop_multi_window:
         git:
             url: https://github.com/Kingtous/rustdesk_desktop_multi_window
-            ref: c7d97cb6615f2def34f8bad4def01af9e0077beb
+            ref: 7b72918710921f5fe79eae2dbaa411a66f5dfb45
     # bitsdojo_window: ^0.1.2
     freezed_annotation: ^2.0.3
     tray_manager: 0.1.7
diff --git a/src/flutter.rs b/src/flutter.rs
index 41e892bd2..4854a0e42 100644
--- a/src/flutter.rs
+++ b/src/flutter.rs
@@ -1,5 +1,5 @@
+use crate::common::make_fd_to_json;
 use crate::{client::*, flutter_ffi::EventToUI};
-use crate::common::{make_fd_to_json};
 use flutter_rust_bridge::{StreamSink, ZeroCopyBuffer};
 use hbb_common::{
     allow_err,
@@ -49,16 +49,17 @@ impl Session {
     ///
     /// # Arguments
     ///
-    /// * `id` - The id of the remote session.
+    /// * `id` - The identifier of the remote session with prefix. Regex: [\w]*[\_]*[\d]+
     /// * `is_file_transfer` - If the session is used for file transfer.
-    pub fn start(id: &str, is_file_transfer: bool, events2ui: StreamSink<EventToUI>) {
-        LocalConfig::set_remote_id(&id);
+    pub fn start(identifier: &str, is_file_transfer: bool, events2ui: StreamSink<EventToUI>) {
+        LocalConfig::set_remote_id(&identifier);
         // TODO check same id
+        let session_id = get_session_id(identifier.to_owned());
         // TODO close
         // Self::close();
         let events2ui = Arc::new(RwLock::new(events2ui));
         let mut session = Session {
-            id: id.to_owned(),
+            id: session_id.clone(),
             sender: Default::default(),
             lc: Default::default(),
             events2ui,
@@ -67,11 +68,11 @@ impl Session {
             .lc
             .write()
             .unwrap()
-            .initialize(id.to_owned(), false, false);
+            .initialize(session_id.clone(), is_file_transfer, false);
         SESSIONS
             .write()
             .unwrap()
-            .insert(id.to_owned(), session.clone());
+            .insert(identifier.to_owned(), session.clone());
         std::thread::spawn(move || {
             Connection::start(session, is_file_transfer);
         });
@@ -179,7 +180,6 @@ impl Session {
     /// Close the session.
     pub fn close(&self) {
         self.send(Data::Close);
-        let _ = SESSIONS.write().unwrap().remove(&self.id);
     }
 
     /// Reconnect to the current session.
@@ -1659,3 +1659,12 @@ pub mod connection_manager {
         }
     }
 }
+
+#[inline]
+pub fn get_session_id(id: String) -> String {
+    return if let Some(index) = id.find('_') {
+        id[index + 1..].to_string()
+    } else {
+        id
+    };
+}
diff --git a/src/flutter_ffi.rs b/src/flutter_ffi.rs
index ee1e4086b..650a7b0b0 100644
--- a/src/flutter_ffi.rs
+++ b/src/flutter_ffi.rs
@@ -1,7 +1,7 @@
 use crate::client::file_trait::FileManager;
+use crate::common::make_fd_to_json;
 use crate::flutter::connection_manager::{self, get_clients_length, get_clients_state};
 use crate::flutter::{self, Session, SESSIONS};
-use crate::common::make_fd_to_json;
 use crate::start_server;
 use crate::ui_interface;
 use flutter_rust_bridge::{StreamSink, SyncReturn, ZeroCopyBuffer};
@@ -133,6 +133,7 @@ pub fn session_close(id: String) {
     if let Some(session) = SESSIONS.read().unwrap().get(&id) {
         session.close();
     }
+    let _ = SESSIONS.write().unwrap().remove(&id);
 }
 
 pub fn session_refresh(id: String) {