The CTC-3 cab signals and speed doesn't update unless I change the camera view and return to the cab camera. It's really frustrating.
I can confirm this bug on Steam. TSW4 has silently introduced a new keybind! Pressing 1 while inside the cab will reset your view to the centre. This has the added bonus of updating the ACSES display without needing to press more than 1 button. I do this whenever I hear ACSES beep, and rely on the analogue speedometer for my current speed.
Finally found out others were having this issue I was going nuts trying to figure out if it was something on my end. Kills any enjoyment of operating the cab car.
bumping, as this bug still exists.... would be nice to see it fixed with the new Boston route coming out.