Scripting a Progress Bar only works if total time is < 5 Seconds

Hi everybody
I am trying to write a simple progress bar script, to use in my other scripts.

// Function to update the progress bar
function updateProgressBar(value, max) {
    var progressBarWindow = new Window("palette", "Progress", undefined);
    var progressBar = progressBarWindow.add("progressbar", undefined, 0, max);
    progressBarWindow.show();
    progressBarWindow.center();
    // Function to update the progress value
    progressBarWindow.updateProgress = function (value) {
        progressBar.value = value;
        this.update();
    };
    return progressBarWindow;
}

// Example usage:

var progressBar = updateProgressBar(0, 100); // Create a progress bar with a maximum value of 100
var startTime = new Date().getTime(); // Get the current time
var duration = 6000; // 5 seconds in milliseconds

while (new Date().getTime() - startTime < duration) {
    // Update the progress bar value based on the elapsed time
    var elapsed = new Date().getTime() - startTime;
    var progress = (elapsed / duration) * 100;
    progressBar.updateProgress(progress);
}
// Close the progress bar window when done
progressBar.close();

this works totally fine for
var duration = 5344
for
var duration = 5345
or more, the script hangs and the progress bar doesn’t close, and is not closeable by hand afterwards.

The same behavior happend when i tried to use in a script which looks in a bunch of layers. If the total time the script needs is under 5 seconds everything works fine, if it needs longer it hangs.

Any ideas on that really strange behavior? I tested on two different computers.
Did somebody have implemented a progress bar in a script and tested if it works fine for longer durations than 5 or 6 seconds? Would be really helpful to know what you did different.