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The comment tools update themselves when the page loads. If a CDN in front of the site holds an old copy, reload once or twice.
Each time the comment tools load on a site, they check they are the newest version and, if not, swap themselves for it on the same page view. So a reload is usually all it takes.
If the site sits behind a CDN such as Cloudflare, it can keep an old copy of the script for a few hours. Reload once or twice, or clear the CDN’s cache.