diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 5b8943d998..55e266ca78 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -10289,6 +10289,9 @@ void GLCanvas3D::_set_warning_notification_if_needed(EWarning warning)
 
 void GLCanvas3D::_set_warning_notification(EWarning warning, bool state)
 {
+    // Skip on shutdown: Plater's pImpl is already freed, so get_notification_manager() would use-after-free.
+    if (wxGetApp().is_closing())
+        return;
     using NotificationLevel = NotificationManager::NotificationLevel;
     enum ErrorType{
         PLATER_WARNING,
diff --git a/src/slic3r/GUI/Selection.cpp b/src/slic3r/GUI/Selection.cpp
index b2caaed55d..5d6a545873 100644
--- a/src/slic3r/GUI/Selection.cpp
+++ b/src/slic3r/GUI/Selection.cpp
@@ -760,6 +760,9 @@ void Selection::clear()
 #endif
 
     // #et_FIXME fake KillFocus from sidebar
+    // Skip on shutdown: Plater's pImpl is already freed, so plater()->canvas3D() would use-after-free.
+    if (wxGetApp().is_closing())
+        return;
     wxGetApp().plater()->canvas3D()->handle_sidebar_focus_event("", false);
 }