I noticed that actors somtimes walk backwards. Last time I encountered this issue I needed to reload the game by pressing F5. A simply game restart didn’t work. Unfortunately, I don’t know how to reproduce this.
Btw.: As a feature it even could come in handy. E. g. that behavior would be useful for climbing down ladders or in order to recoil from a danger. However, we need to have control of this. Without control it doesn’t make sense.