I have 99 urls in the queue. But scraper finishes crawl after a few urls, why?

 const playRequestQ = await RequestQueue.open('q1');
    const urlsToAdd: { url: string; }[] = []
    nodeEvts.on('links', onLinks)

    async function onLinks(link: any;) {
        urlsToAdd.push({ url: `${link}` })
        if (urlsToAdd.length % 99 === 0) {
            await playRequestQ.addRequests(urlsToAdd)
            crawler.run();
        }
    }

 const playRequestQ = await RequestQueue.open('q1');
    const urlsToAdd: { url: string; }[] = []
    nodeEvts.on('links', onLinks)

    async function onLinks(link: any;) {
        urlsToAdd.push({ url: `${link}` })
        if (urlsToAdd.length % 99 === 0) {
            await playRequestQ.addRequests(urlsToAdd)
            crawler.run();
        }
    }