diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index e755ff4da..0550f8ac4 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -2349,7 +2349,7 @@ void MainFrame::init_menubar_as_editor()
 //        }
 //        case ConfigMenuPreferences:
 //        {
-//            wxGetApp().CallAfter([this] {
+//            CallAfter([this] {
 //                PreferencesDialog dlg(this);
 //                dlg.ShowModal();
 //#if ENABLE_GCODE_LINES_ID_IN_H_SLIDER
@@ -2386,7 +2386,7 @@ void MainFrame::init_menubar_as_editor()
         //            Slic3r::GUI::about();
         //            break;
         //        case BambuStudioMenuPreferences:
-        //            wxGetApp().CallAfter([this] {
+        //            CallAfter([this] {
         //                PreferencesDialog dlg(this);
         //                dlg.ShowModal();
         //#if ENABLE_GCODE_LINES_ID_IN_H_SLIDER
@@ -3030,7 +3030,7 @@ void MainFrame::open_recent_project(size_t file_id, wxString const & filename)
         file_id = m_recent_projects.FindFileInHistory(filename);
     }
     if (wxFileExists(filename)) {
-        wxGetApp().CallAfter([this, filename] {
+        CallAfter([this, filename] {
             if (wxGetApp().can_load_project())
                 m_plater->load_project(filename);
         });
diff --git a/src/slic3r/GUI/MediaPlayCtrl.cpp b/src/slic3r/GUI/MediaPlayCtrl.cpp
index 407e89530..797e12be4 100644
--- a/src/slic3r/GUI/MediaPlayCtrl.cpp
+++ b/src/slic3r/GUI/MediaPlayCtrl.cpp
@@ -311,7 +311,7 @@ void MediaPlayCtrl::ToggleStream()
                     { return std::make_shared<UpgradeNetworkJob2>(pri); }
                     void                               on_finish() override
                     {
-                        wxGetApp().CallAfter([ctrl = this->ctrl] { ctrl->ToggleStream(); });
+                        ctrl->CallAfter([ctrl = this->ctrl] { ctrl->ToggleStream(); });
                         EndModal(wxID_CLOSE);
                     }
                 };
@@ -585,7 +585,7 @@ void wxMediaCtrl2::DoSetSize(int x, int y, int width, int height, int sizeFlags)
     if (maxHeight != GetMaxHeight()) {
         // BOOST_LOG_TRIVIAL(info) << "wxMediaCtrl2::DoSetSize: width: " << width << ", height: " << height << ", maxHeight: " << maxHeight;
         SetMaxSize({-1, maxHeight});
-        Slic3r::GUI::wxGetApp().CallAfter([this] {
+        CallAfter([this] {
             if (auto p = GetParent()) {
                 p->Layout();
                 p->Refresh();
diff --git a/src/slic3r/GUI/Widgets/WebView.cpp b/src/slic3r/GUI/Widgets/WebView.cpp
index 59b1a866a..ed1c30067 100644
--- a/src/slic3r/GUI/Widgets/WebView.cpp
+++ b/src/slic3r/GUI/Widgets/WebView.cpp
@@ -180,14 +180,18 @@ wxWebView* WebView::CreateWebView(wxWindow * parent, wxString const & url)
         Slic3r::GUI::WKWebView_setTransparentBackground(wkWebView);
 #endif
 #ifndef __WIN32__
-        Slic3r::GUI::wxGetApp().CallAfter([webView] {
+        webView->CallAfter([webView] {
 #endif
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ": begin to add script message handler for wx.";
         Slic3r::GUI::wxGetApp().set_adding_script_handler(true);
+        webView->Bind(wxEVT_DESTROY, [webView] (auto & e) {
+            webView->RemoveScriptMessageHandler("wx");
+        });
         if (!webView->AddScriptMessageHandler("wx"))
             wxLogError("Could not add script message handler");
         Slic3r::GUI::wxGetApp().set_adding_script_handler(false);
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ": finished add script message handler for wx.";
+
 #ifndef __WIN32__
         });
 #endif
diff --git a/src/slic3r/GUI/wxMediaCtrl2.cpp b/src/slic3r/GUI/wxMediaCtrl2.cpp
index 6ef78eec6..fd792c9c7 100644
--- a/src/slic3r/GUI/wxMediaCtrl2.cpp
+++ b/src/slic3r/GUI/wxMediaCtrl2.cpp
@@ -43,7 +43,7 @@ void wxMediaCtrl2::Load(wxURI url)
 {
 #ifdef __WIN32__
     if (m_imp == nullptr) {
-        Slic3r::GUI::wxGetApp().CallAfter([] {
+        CallAfter([] {
             auto res = wxMessageBox(_L("Windows Media Player is required for this task! Do you want to enable 'Windows Media Player' for your operation system?"), _L("Error"), wxOK | wxCANCEL);
             if (res == wxOK) {
                 wxString url = IsWindows10OrGreater() 
@@ -73,7 +73,7 @@ void wxMediaCtrl2::Load(wxURI url)
             boost::filesystem::path data_dir_path(data_dir_str);
             auto                    dll_path = data_dir_path / "plugins" / "BambuSource.dll";
             if (boost::filesystem::exists(dll_path)) {
-                Slic3r::GUI::wxGetApp().CallAfter(
+                CallAfter(
                     [dll_path] {
                     int res = wxMessageBox(_L("BambuSource has not correctly been registered for media playing! Press Yes to re-register it."), _L("Error"), wxYES_NO);
                     if (res == wxYES) {
@@ -82,7 +82,7 @@ void wxMediaCtrl2::Load(wxURI url)
                     }
                 });
             } else {
-                Slic3r::GUI::wxGetApp().CallAfter([] {
+                CallAfter([] {
                     wxMessageBox(_L("Missing BambuSource component registered for media playing! Please re-install BambuStutio or seek after-sales help."), _L("Error"), wxOK);
                 });
             }
@@ -131,7 +131,7 @@ void wxMediaCtrl2::Load(wxURI url)
     }
     
     if (!hasplugins) {
-        Slic3r::GUI::wxGetApp().CallAfter([] {
+        CallAfter([] {
             wxMessageBox(_L("Your system is missing H.264 codecs for GStreamer, which are required to play video.  (Try installing the gstreamer1.0-plugins-bad or gstreamer1.0-libav packages, then restart Bambu Studio?)"), _L("Error"), wxOK);
         });
         m_error = 101;