diff --git a/src/libslic3r/GCode/GCodeProcessor.cpp b/src/libslic3r/GCode/GCodeProcessor.cpp
index b2facc583e..386bb1137c 100644
--- a/src/libslic3r/GCode/GCodeProcessor.cpp
+++ b/src/libslic3r/GCode/GCodeProcessor.cpp
@@ -4039,7 +4039,7 @@ void GCodeProcessor::update_slice_warnings()
 
     if (!warning.params.empty()) {
         warning.msg         = BED_TEMP_TOO_HIGH_THAN_FILAMENT;
-        warning.error_code  = "10004001";
+        warning.error_code  = "1000C001";
         m_result.warnings.push_back(warning);
 
     //bbs:HRC checker
@@ -4057,6 +4057,12 @@ void GCodeProcessor::update_slice_warnings()
         }
     }
 
+    if (!warning.params.empty()) {
+        warning.msg = NOZZLE_HRC_CHECKER;
+        warning.error_code = "1000C002";
+        m_result.warnings.push_back(warning);
+    }
+
     m_result.warnings.shrink_to_fit();
 }
 
diff --git a/src/slic3r/GUI/DeviceManager.hpp b/src/slic3r/GUI/DeviceManager.hpp
index 48b39ee9cc..b07221bcdf 100644
--- a/src/slic3r/GUI/DeviceManager.hpp
+++ b/src/slic3r/GUI/DeviceManager.hpp
@@ -439,7 +439,7 @@ public:
     /* upgrade */
     bool upgrade_force_upgrade { false };
     bool upgrade_new_version { false };
-    bool upgrade_consistency_request;
+    bool upgrade_consistency_request { false };
     int upgrade_display_state = 0;           // 0 : upgrade unavailable, 1: upgrade idle, 2: upgrading, 3: upgrade_finished
     PrinterFirmwareType       firmware_type; // engineer|production
     std::string upgrade_progress;
diff --git a/src/slic3r/GUI/DownloadProgressDialog.cpp b/src/slic3r/GUI/DownloadProgressDialog.cpp
index cf6a3892ed..d84f31f8cf 100644
--- a/src/slic3r/GUI/DownloadProgressDialog.cpp
+++ b/src/slic3r/GUI/DownloadProgressDialog.cpp
@@ -145,7 +145,7 @@ bool DownloadProgressDialog::Show(bool show)
         m_upgrade_job->set_event_handle(this);
         m_status_bar->set_progress(0);
         Bind(EVT_UPGRADE_NETWORK_SUCCESS, [this](wxCommandEvent& evt) {
-            m_status_bar->change_button_label(_L("Finish"));
+            m_status_bar->change_button_label(_L("Close"));
             on_finish();
             m_status_bar->set_cancel_callback_fina(
                 [this]() {
diff --git a/src/slic3r/GUI/SelectMachine.cpp b/src/slic3r/GUI/SelectMachine.cpp
index 84d1c3c821..daf69e99ce 100644
--- a/src/slic3r/GUI/SelectMachine.cpp
+++ b/src/slic3r/GUI/SelectMachine.cpp
@@ -1606,7 +1606,7 @@ void SelectMachineDialog::show_status(PrintDialogStatus status, std::vector<wxSt
     } else if (status == PrintDialogStatus::PrintStatusConnectingServer) {
         wxString msg_text = _L("Connecting to server");
         update_print_status_msg(msg_text, true, true);
-        Enable_Send_Button(true);
+        Enable_Send_Button(false);
         Enable_Refresh_Button(true);
     } else if (status == PrintDialogStatus::PrintStatusReading) {
         wxString msg_text = _L("Synchronizing device information");