in src/main/resources/patch/SplashManager.java [157:167]
public static void hideBeforeShow(@NotNull Window window) {
if (SPLASH_WINDOW != null || PROJECT_FRAME != null) {
window.addWindowListener(new WindowAdapter() {
@Override
public void windowOpened(WindowEvent e) {
hide();
window.removeWindowListener(this);
}
});
}
}