unminimize does not work on Ubuntu 24.04

I have tried to create a standalone version of the problem in https://github.com/The-OpenROAD-Project/OpenROAD/issues/6172 where the GUI no longer unminimizes on Ubuntu 24.04. The desired behavior is for the GUI to run for an extended period of time minimized when it is computing various things and then only show the window normalized when the GUI is in fact responsive. If the GUI is unmimized before the computation is complete, the user can see some progress messages, but the GUI is otherwise unresponsive.

unminimized does not work on Ubuntu 24.04. I've tried with and without wayland.

On Ubuntu 24.04, unzip attached test.zip and run "./test".

#include "test.h"
#include <QApplication>
 
void MainWindow::unminimize()
{
     printf("Unminimizing\n");
     this->showNormal();
}
 
int main(int argc, char *argv[])
{
     QApplication app(argc, argv);
     MainWindow window;
     window.showMinimized();
     // Create a timer to unminimize after 1 second
     QTimer::singleShot(3000, &window, SLOT(unminimize()));
     return app.exec();
}
 

```