diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 3169e53eee..889cccde0f 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1900,6 +1900,7 @@ void GUI_App::init_networking_callbacks()
             }
             if (return_code == 5) {
                 GUI::wxGetApp().CallAfter([this, provider = event.provider] {
+                    BOOST_LOG_TRIVIAL(info) << "logout: login expired";
                     this->request_user_logout(provider);
                     MessageDialog msg_dlg(nullptr, _L("Login information expired. Please login again."), "", wxAPPLY | wxOK);
                     if (msg_dlg.ShowModal() == wxOK) {
@@ -4526,7 +4527,8 @@ std::string GUI_App::handle_web_request(std::string cmd)
             }
             else if (command_str.compare("homepage_logout") == 0) {
                 CallAfter([this] {
-                    wxGetApp().request_user_logout();
+                    BOOST_LOG_TRIVIAL(info) << "logout: homepage_logout";
+                    request_user_logout();
                 });
             }
             else if (command_str.compare("get_orca_login_info") == 0) {
@@ -4539,18 +4541,22 @@ std::string GUI_App::handle_web_request(std::string cmd)
                 CallAfter([this] { request_login(true, BBL_CLOUD_PROVIDER); });
             }
             else if (command_str.compare("homepage_bambu_logout") == 0) {
-                CallAfter([this] { request_user_logout(BBL_CLOUD_PROVIDER); });
+                CallAfter([this] {
+                    BOOST_LOG_TRIVIAL(info) << "logout: homepage_bambu_logout";
+                    request_user_logout(BBL_CLOUD_PROVIDER);
+                });
             }
             else if (command_str.compare("homepage_orca_login_or_register") == 0) {
                 CallAfter([this] { request_login(true, ORCA_CLOUD_PROVIDER); });
             }
             else if (command_str.compare("homepage_orca_logout") == 0) {
-                CallAfter([this] { request_user_logout(ORCA_CLOUD_PROVIDER); });
+                CallAfter([this] {
+                    BOOST_LOG_TRIVIAL(info) << "logout: homepage_orca_logout";
+                    request_user_logout(ORCA_CLOUD_PROVIDER);
+                });
             }
             else if (command_str.compare("homepage_modeldepot") == 0) {
-                CallAfter([this] {
-                    wxGetApp().open_mall_page_dialog();
-                });
+                CallAfter([this] { open_mall_page_dialog(); });
             }
             else if (command_str.compare("homepage_newproject") == 0) {
                 this->request_open_project("<new>");
@@ -4826,6 +4832,7 @@ void GUI_App::on_http_error(wxCommandEvent &evt)
     if (status == 401) {
         if (m_agent) {
             if (m_agent->is_user_login(provider)) {
+                BOOST_LOG_TRIVIAL(warning) << "logout: http error 401.";
                 this->request_user_logout(provider);
 
                 if (!m_show_http_errpr_msgdlg) {
@@ -5599,6 +5606,7 @@ void GUI_App::show_check_privacy_dlg(wxCommandEvent& evt)
     privacy_dlg.Bind(EVT_PRIVACY_UPDATE_CANCEL, [this, provider](wxCommandEvent &e) {
             app_config->set_bool("privacy_update_checked", false);
             if (m_agent) {
+                BOOST_LOG_TRIVIAL(info) << "logout: Privacy update dialog cancelled.";
                 m_agent->user_logout(false, provider);
                 post_logout_to_webview(provider);
             }
@@ -6766,6 +6774,7 @@ void GUI_App::stop_sync_user_preset()
 void GUI_App::on_stealth_mode_enter()
 {
     stop_sync_user_preset();
+    BOOST_LOG_TRIVIAL(info) << "logout: on_stealth_mode_enter";
     request_user_logout(ORCA_CLOUD_PROVIDER);
     request_user_logout(BBL_CLOUD_PROVIDER);
     if (mainframe && mainframe->m_webview) {
diff --git a/src/slic3r/GUI/WebGuideDialog.cpp b/src/slic3r/GUI/WebGuideDialog.cpp
index 575748fce0..f68c00ff40 100644
--- a/src/slic3r/GUI/WebGuideDialog.cpp
+++ b/src/slic3r/GUI/WebGuideDialog.cpp
@@ -4,6 +4,7 @@
 #include <boost/filesystem/operations.hpp>
 #include <boost/filesystem/path.hpp>
 #include <boost/iostreams/detail/select.hpp>
+#include <boost/log/trivial.hpp>
 #include <string.h>
 #include "I18N.hpp"
 #include "libslic3r/AppConfig.hpp"
@@ -516,7 +517,9 @@ void GuideFrame::OnScriptMessage(wxWebViewEvent &evt)
                 if (agent) {
                     agent->set_country_code(country_code);
                     if (wxGetApp().is_user_login()) {
-                        agent->user_logout();
+                        BOOST_LOG_TRIVIAL(info) << "logout: user_logout on user_guide_finish";
+                        // agent->user_logout();
+                        wxGetApp().request_user_logout();
                     }
                 }
             }
diff --git a/src/slic3r/Utils/OrcaCloudServiceAgent.cpp b/src/slic3r/Utils/OrcaCloudServiceAgent.cpp
index 4298f9616c..2b32b428ea 100644
--- a/src/slic3r/Utils/OrcaCloudServiceAgent.cpp
+++ b/src/slic3r/Utils/OrcaCloudServiceAgent.cpp
@@ -1465,6 +1465,7 @@ bool OrcaCloudServiceAgent::load_refresh_token(std::string& out_token)
                 if (payload.rfind("v2:", 0) == 0) {
                     auto delim = payload.find(':', 3);
                     if (delim == std::string::npos) {
+                        BOOST_LOG_TRIVIAL(warning) << "payload missing delim ':'.";
                         integrity_ok = false;
                     } else {
                         std::string stored_hmac = payload.substr(3, delim - 3);