When I'm asked to set the throttle coast, I find that the throttle is lock into the power range so it's not possible to cut the power or stop the train. Ts2prototype 2022 10 19 22 58 20 02 - YouTube
There is a workaround (albeit a tricky one) here - https://forums.dovetailgames.com/threads/lirr-m7-introduction.59046/
The M3 is also broken, after the emergency stop and the controls have been reset the reverser becomes locked in the neutral position so you cannot progress any further.