Windows: QGuiApplication::screens sometimes reports inaccurate results

#include <QApplication>
#include <QLabel>
#include <QScreen>
#include <QStyle>
#include <QSystemTrayIcon>

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	app.setApplicationName("Qt screen count bug");
	app.setQuitOnLastWindowClosed(false);

	QLabel window;
	window.resize({ 300, 100 });
	window.show();

	auto updateText = [&window]()
	{
		window.setText(QString("Screen count: %1").arg(QGuiApplication::screens().count()));
	};
	updateText();

	QGuiApplication* guiApp = static_cast<QGuiApplication*>(&app);
	QObject::connect(guiApp, &QGuiApplication::screenAdded, updateText);
	QObject::connect(guiApp, &QGuiApplication::screenRemoved, updateText);

	QSystemTrayIcon icon;
	icon.setIcon(QApplication::style()->standardIcon(QStyle::SP_ComputerIcon));
	icon.show();

	// Not using a context menu here because opening the context menu creates
	// a long-lived HWND that will handle the WM_DISPLAYCHANGE event. This
	// would cause the repro steps to work only once per session.
	QObject::connect(&icon, &QSystemTrayIcon::activated, [&](auto reason)
	{
		switch (reason)
		{
		case QSystemTrayIcon::DoubleClick:
			updateText();
			window.show();
			break;

		case QSystemTrayIcon::MiddleClick:
		case QSystemTrayIcon::Context:
			app.exit();
			break;

		default:
			break;
		}
	});

	return app.exec();
}