diff --git a/src/slic3r/GUI/3DScene.hpp b/src/slic3r/GUI/3DScene.hpp
index 5daf4b9416..15ac6a3a19 100644
--- a/src/slic3r/GUI/3DScene.hpp
+++ b/src/slic3r/GUI/3DScene.hpp
@@ -364,7 +364,7 @@ public:
     void set_volume_rotation(const Vec3d& rotation) { m_volume_transformation.set_rotation(rotation); set_bounding_boxes_as_dirty(); }
     void set_volume_rotation(Axis axis, double rotation) { m_volume_transformation.set_rotation(axis, rotation); set_bounding_boxes_as_dirty(); }
 
-    Vec3d get_volume_scaling_factor() const { return m_volume_transformation.get_scaling_factor(); }
+    const Vec3d& get_volume_scaling_factor() const { return m_volume_transformation.get_scaling_factor(); }
     double get_volume_scaling_factor(Axis axis) const { return m_volume_transformation.get_scaling_factor(axis); }
 
     void set_volume_scaling_factor(const Vec3d& scaling_factor) { m_volume_transformation.set_scaling_factor(scaling_factor); set_bounding_boxes_as_dirty(); }
diff --git a/src/slic3r/GUI/GUI_Preview.cpp b/src/slic3r/GUI/GUI_Preview.cpp
index cedc66d714..661b217445 100644
--- a/src/slic3r/GUI/GUI_Preview.cpp
+++ b/src/slic3r/GUI/GUI_Preview.cpp
@@ -371,6 +371,9 @@ void Preview::load_print()
 
 void Preview::reload_print(bool force, bool keep_volumes)
 {
+    if (!IsShown() && !force)
+        return;
+
     if (!keep_volumes)
     {
         m_canvas->reset_volumes();
@@ -378,9 +381,6 @@ void Preview::reload_print(bool force, bool keep_volumes)
         m_loaded = false;
     }
 
-    if (!IsShown() && !force)
-        return;
-
     load_print();
 }