Vehicle backward speed stuck

I was play 0.B stable version, I found a big problem, the vehicle backward speed get stuck if the number are too high, like -112 KM,

I driving a beetle, but the inflatable boat is even worst, always stuck speed if you backward anytime, even it just -12KM

hope someone get fix soon.

I had the same problem, without cruise control the speed behaves normal but whenever you go back to CC the speed is stuck to -112km/h.
It fixed itself when I used the handbrake.