diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index ddc460e770..4e90b94572 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -1528,6 +1528,8 @@ bool GLCanvas3D::check_volumes_outside_state(GLVolumeCollection& volumes, ModelI
                 contained_min_one |= !volume->is_outside;
             }
         }
+        else if (volume->is_modifier)
+            volume->is_outside = false;
     }
 
     for (unsigned int vol_idx = 0; vol_idx < volumes.volumes.size(); ++vol_idx) {
@@ -2371,6 +2373,7 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
                     volume->extruder_id = extruder_id;
 
                 volume->is_modifier = !mvs->model_volume->is_model_part();
+                volume->shader_outside_printer_detection_enabled = mvs->model_volume->is_model_part();
                 volume->set_color(color_from_model_volume(*mvs->model_volume));
                 // force update of render_color alpha channel 
                 volume->set_render_color(volume->color.is_transparent());