Mac: Multiple modal dialogs block all input

#include <QApplication>
#include <QInputDialog>
#include <QMainWindow>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QMainWindow w;
    w.resize(800, 600);

    auto in1 = new QInputDialog(&w);
    auto in2 = new QInputDialog(&w);

    // only one QInputDialog will be displayed on mac as both are centered without window decorations
    // the visible QInputDialog won't accept any inputs....
    // the application is not responding and a force quit is required

    in1->open();
    in2->open();

    w.show();
    return a.exec();
}