M src/platform/qt/GameController.cpp → src/platform/qt/GameController.cpp

@@ -479,6 +479,9 @@ m_rewindTimer.start();
 }
 
 void GameController::stopRewinding() {
+	if (!m_rewindTimer.isActive()) {
+		return;
+	}
 	m_rewindTimer.stop();
 	setPaused(m_wasPaused);
 }

M src/platform/qt/Window.cpp → src/platform/qt/Window.cpp

@@ -406,6 +406,7 @@ }
 
 void Window::focusOutEvent(QFocusEvent*) {
 	m_controller->setTurbo(false, false);
+	m_controller->stopRewinding();
 	m_controller->clearKeys();
 }