Because in CliClient.resume() we don't account for the case, when there is an exception in one of the async processing stages:

void resume() {
	...
	try {
		client.startAsync(state -> {
			printer.ifPresent(p -> p.print(state));
			if (!options.shouldSeedAfterDownloaded() && state.getPiecesRemaining() == 0) {
				runtime.shutdown();
			}
		}, 1000); // <-- CompletableFuture.w

Hello. And thank you for your time spent on this program.

I'd like to have an option "Close to system tray", not only "Minimize to system tray". And nice option to minimize with ESC key - ESC pressed and DZA minimized to system tray.

will look forward.