I am not going to click a link to X, but this article covers that, and links this raw footage video on X which supposedly proves this claim to be false.
In addition to the folks pointing out it likes to shut itself off (which I can neither confirm nor deny)
https://www.pcmag.com/news/tesla-on-autopilot-runs-over-mannequin-hits-wall-in-viral-video-but-is
Some skeptical viewers claim Autopilot was not engaged when the vehicle ran into the wall. These allegations prompted Rober to release the "raw footage" in a X post, which shows the characteristic signs of Autopilot being engaged, such as a rainbow road appearing on the dash.