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@tanghus @cheeaun @benjaoming Imagine I post a link to a site. The moment I do, this instance fetches that page to make a preview.

Then the site’s author makes some changes to it.

A few hours later, my toot makes its way to another site. When that site fetches the page to make the preview, it’s seeing the new, updated content and makes a different preview card for it.

Instead of deliberate changes, it could be all sorts of automation on the website.