Description

I've encountered an issue where setting the MessageBox title to "Caption" causes the message box to automatically close after being displayed for a few seconds. Why does this happen? I'm currently using .NET 5.

Reproduction Steps

private void Button_Click(object sender, RoutedEventArgs e)
{
    MessageBox.Show("MessageBoxText", "Caption");
}

Expected behavior

Normally, the MessageBox should only close when I click the close button or the OK button.

Actual behavior

Actually, when the title is set to "Caption", the MessageBox will automatically close after being displayed for a few seconds.

Regression?

No response

Known Workarounds

No response

Impact

No response

Configuration

No response

Other information

No response