Read 2020-11-04: New Twitter UI: Replaying Archived Twitter Pages That Never Existed by Himarsha Jayanetti (ws-dl.blogspot.com | The Web Science and Digital Libraries Research Group at Old Dominion University.)

When you visit web archives to go back in time and look at a web page, you naturally expect it to display the content exactly as it appeared on the live web at that particular datetime. That is, of course, with the assumption in mind that all of the resources on the page were captured at or near the time of the datetime displayed in the banner for the root HTML page. However, we noticed that it is not always the case and problems with archiving Twitter's new UI can result in replaying Twitter profile pages that never existed on the live web. In our previous blog post, we talked about how difficult it is to archive Twitter's new UI, and in this blog post, we uncover how the new Twitter UI mementos in the Internet Archive are vulnerable to temporal violations.

An interesting quirk of archiving pages on the modern internet.