diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index ff2479987..35aae2b33 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -2253,10 +2253,17 @@ bool GUI_App::OnInit()
 
 class wxBoostLog : public wxLog
 {
-    void DoLogText(const wxString &msg) {
+    void DoLogText(const wxString &msg) override {
         
         BOOST_LOG_TRIVIAL(warning) << msg.ToUTF8().data();
     }
+    ~wxBoostLog() override
+    {
+        // This is a hack. Prevent thread logs from going to wxGuiLog on app quit.
+        auto t = wxLog::SetActiveTarget(this);
+        wxLog::FlushActive();
+        wxLog::SetActiveTarget(t);
+    }
 };
 
 bool GUI_App::on_init_inner()
diff --git a/src/slic3r/GUI/Widgets/DropDown.cpp b/src/slic3r/GUI/Widgets/DropDown.cpp
index 4e77b6dc8..ba1a3117f 100644
--- a/src/slic3r/GUI/Widgets/DropDown.cpp
+++ b/src/slic3r/GUI/Widgets/DropDown.cpp
@@ -475,10 +475,9 @@ void DropDown::mouseWheelMoved(wxMouseEvent &event)
 // currently unused events
 void DropDown::sendDropDownEvent()
 {
-    selection = hover_item;
     wxCommandEvent event(wxEVT_COMBOBOX, GetId());
     event.SetEventObject(this);
-    event.SetInt(selection);
+    event.SetInt(hover_item);
     event.SetString(GetValue());
     GetEventHandler()->ProcessEvent(event);
 }