Qt не ловит клавиши F3 и F5 в QKeySequence внутри приложения (а F7 и F9 ловит)

KeyPress event, serial 48, synthetic NO, window 0x6200001,
    root 0x28e, subw 0x0, time 179392275, (1269,420), root:(1270,442),
    state 0x0, keycode 69 (keysym 0xffc0, F3), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 48, synthetic NO, window 0x6200001,
    root 0x28e, subw 0x0, time 179392339, (1269,420), root:(1270,442),
    state 0x0, keycode 69 (keysym 0xffc0, F3), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

...
    
KeyPress event, serial 48, synthetic NO, window 0x6200001,
    root 0x28e, subw 0x0, time 179419058, (1130,256), root:(1131,278),
    state 0x0, keycode 71 (keysym 0xffc2, F5), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 48, synthetic NO, window 0x6200001,
    root 0x28e, subw 0x0, time 179419122, (1130,256), root:(1131,278),
    state 0x0, keycode 71 (keysym 0xffc2, F5), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

bool MainWindow::eventFilter( QObject *o, QEvent * e )
{
  // Отлавливание потери фокуса
  if(o==this && e->type() == QEvent::WindowDeactivate)
  {
    qDebug() << "Main window focus deactivate, save all state.";
    saveAllState();
  }

  return QMainWindow::eventFilter(o, e);
} 

// Обработчик отлавливает нажатия клавиш
void MainWindow::keyPressEvent(QKeyEvent *event)
{
  // Проброс нажатия клавиши Ctrl в редактор, даже если он не активный (не в фокусе)
  if( event->key() == Qt::Key_Control )
    if(editorScreen!=NULL)
      emit globalPressKey(Qt::Key_Control);

  qDebug() << "Event MainWindow: " << event->key();

  QMainWindow::keyPressEvent(event);
}

13:45:56 [DBG] Event MainWindow:  16777268
13:45:57 [DBG] Event MainWindow:  16777267