On the website, go to Settings → Live → Enable Premoves (off). On the app, go to Settings → Play → Live → Enable Premoves. On the app, you can also choose to have it ask for confirmation before every move, but doing that will make time scrambles difficult.
This is an accessibility issue. Please make it possible to turn off premove.
More than once now, I've accidentally pre-moved a piece I did not intend to, and was unable to cancel the premove.
This is a terrible feature! I have a neurological motor issue, and premoves need to be disabled, but I can not find that option anywhere.