diff --git a/flutter/lib/desktop/pages/remote_page.dart b/flutter/lib/desktop/pages/remote_page.dart
index 5e3d15130..6503fe108 100644
--- a/flutter/lib/desktop/pages/remote_page.dart
+++ b/flutter/lib/desktop/pages/remote_page.dart
@@ -85,6 +85,9 @@ class _RemotePageState extends State<RemotePage>
 
   final FocusNode _rawKeyFocusNode = FocusNode(debugLabel: "rawkeyFocusNode");
 
+  // We need `_instanceIdOnEnterOrLeaveImage4Toolbar` together with `_onEnterOrLeaveImage4Toolbar`
+  // to identify the toolbar instance and its callback function.
+  int? _instanceIdOnEnterOrLeaveImage4Toolbar;
   Function(bool)? _onEnterOrLeaveImage4Toolbar;
 
   late FFI _ffi;
@@ -268,9 +271,18 @@ class _RemotePageState extends State<RemotePage>
           id: widget.id,
           ffi: _ffi,
           state: widget.toolbarState,
-          onEnterOrLeaveImageSetter: (func) =>
-              _onEnterOrLeaveImage4Toolbar = func,
-          onEnterOrLeaveImageCleaner: () => _onEnterOrLeaveImage4Toolbar = null,
+          onEnterOrLeaveImageSetter: (id, func) {
+            _instanceIdOnEnterOrLeaveImage4Toolbar = id;
+            _onEnterOrLeaveImage4Toolbar = func;
+          },
+          onEnterOrLeaveImageCleaner: (id) {
+            // If _instanceIdOnEnterOrLeaveImage4Toolbar != id
+            // it means `_onEnterOrLeaveImage4Toolbar` is not set or it has been changed to another toolbar.
+            if (_instanceIdOnEnterOrLeaveImage4Toolbar == id) {
+              _instanceIdOnEnterOrLeaveImage4Toolbar = null;
+              _onEnterOrLeaveImage4Toolbar = null;
+            }
+          },
           setRemoteState: setState,
         );
 
diff --git a/flutter/lib/desktop/widgets/remote_toolbar.dart b/flutter/lib/desktop/widgets/remote_toolbar.dart
index 2e1ca67b0..869fe87a7 100644
--- a/flutter/lib/desktop/widgets/remote_toolbar.dart
+++ b/flutter/lib/desktop/widgets/remote_toolbar.dart
@@ -332,8 +332,8 @@ class RemoteToolbar extends StatefulWidget {
   final String id;
   final FFI ffi;
   final ToolbarState state;
-  final Function(Function(bool)) onEnterOrLeaveImageSetter;
-  final VoidCallback onEnterOrLeaveImageCleaner;
+  final Function(int, Function(bool)) onEnterOrLeaveImageSetter;
+  final Function(int) onEnterOrLeaveImageCleaner;
   final Function(VoidCallback) setRemoteState;
 
   RemoteToolbar({
@@ -393,7 +393,7 @@ class _RemoteToolbarState extends State<RemoteToolbar> {
       initialValue: 0,
     );
 
-    widget.onEnterOrLeaveImageSetter((enter) {
+    widget.onEnterOrLeaveImageSetter(identityHashCode(this), (enter) {
       if (enter) {
         triggerAutoHide();
         _isCursorOverImage = true;
@@ -413,12 +413,11 @@ class _RemoteToolbarState extends State<RemoteToolbar> {
   dispose() {
     super.dispose();
 
-    widget.onEnterOrLeaveImageCleaner();
+    widget.onEnterOrLeaveImageCleaner(identityHashCode(this));
   }
 
   @override
   Widget build(BuildContext context) {
-    // No need to use future builder here.
     return Align(
       alignment: Alignment.topCenter,
       child: Obx(() => show.value