diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 3632bb07c..062746e79 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -1986,7 +1986,6 @@ sub on_config_change {
 
 sub item_changed_selection{
     my ($self, $obj_idx) = @_;
-    printf "BEGIN item_changed_selection : obj_idx = $obj_idx\n";
 
     $self->{canvas}->Refresh;
     if ($self->{canvas3D}) {
@@ -1997,7 +1996,6 @@ sub item_changed_selection{
         }
         Slic3r::GUI::_3DScene::render($self->{canvas3D});
     }
-    printf "END item_changed_selection";
 }
 
 sub collect_selections {
diff --git a/xs/src/slic3r/GUI/GUI_ObjectParts.cpp b/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
index 47be0b832..93d649abf 100644
--- a/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
+++ b/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
@@ -1325,11 +1325,13 @@ void update_settings_value()
 		og->set_value("scale_y", 0);
 		og->set_value("scale_z", 0);
         printf("return because of unselect\n");
+        og->disable();
 		return;
 	}
     g_is_percent_scale = boost::any_cast<wxString>(og->get_value("scale_unit")) == _("%");
     update_scale_values();
     update_rotation_values();
+    og->enable();
 }
 
 void part_selection_changed()
@@ -1357,13 +1359,11 @@ void part_selection_changed()
 
 		auto config = m_config;
         og->set_value("object_name", m_objects_model->GetName(item));
-        og->enable();
 		m_default_config = std::make_shared<DynamicPrintConfig>(*DynamicPrintConfig::new_from_defaults_keys(get_options(is_part)));
 	}
     else {
         wxString empty_str = wxEmptyString;
         og->set_value("object_name", empty_str);
-        og->disable();
         m_config = nullptr;
     }
 
@@ -1475,6 +1475,7 @@ void set_extruder_column_hidden(bool hide)
 
 void update_extruder_in_config(const wxString& selection)
 {
+    printf("BEGIN OF update_extruder_in_config\n");
     if (!*m_config || selection.empty())
         return;
 
@@ -1485,6 +1486,7 @@ void update_extruder_in_config(const wxString& selection)
         wxCommandEvent e(m_event_update_scene);
         get_main_frame()->ProcessWindowEvent(e);
     }
+    printf("END OF update_extruder_in_config\n");
 }
 
 void update_scale_values()