We became aware of a bug, a week or two ago, that allows any words and phrases to be updated and manipulated on a post page hyperlink that leads back to Reddit. We’re working with the appropriate partners on a fix. For context, we’ve found that Google will index URLs that work that it finds, both on and off platform, so if someone shared a link on another platform to one of those arbitrary URLs, Google will crawl and index it, even if we don’t “officially” support it.