The latest "joy" of version Nein! is when cancelling Autosteer (for example because you are stuck behind a vehicle moving slower than your set TACC speed, and you need to pass it without using Auto Lane Change, or when you are following the vehicle through a curve so it temporarily slows down and Autosteer can't handle the curve) Autopilot resets the TACC speed lower to your current speed. This "feature" appeared sometime in December and it is extremely annoying. I can't think of a reason why Tesla changed the behavior, or why they would not inform us of the change in the release notes or otherwise.