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

Feature Request: Add Support For Unrar & Unzip Password Contained Rar/Zip Files, So That We Can Extract Them With Password.

Now I use a SQL to cleanup torrents belongs to nobody.

DELETE
FROM torrents
WHERE id NOT IN (
  SELECT torrent_id
  FROM user_torrents
)

This should be done automatically.