PC Long Island Railroad Bugs Found

Hi
Today i just try out the long island railroad route, and found a bug on the train. For some reason which i switch the throttle on the M4 or M3 Cab, there was problem. No matter how much i press on the "a" key on the keyboard, the throttle won't move to next gear, until i have to hold the "a" key down and then the throttle would move to the next power gear. which decreasing there has also been a problem? Can you please look into this, i really want to play this route without any problem?
I don't know if others are also experiencing the same problem as me and this is on the PC version.

 

With the M3, the throttle won’t decrease power unless you put it in coast, then back to a lower setting. That’s how it works IRL.

 

There is something wrong with the train because i didn't have any problem before and when i try the other train there was no problem at all. I know how to drive this train, it not that problem is a problem with the configuration script or something or bug for this train, i have not had any problem before at the old tsw game. but thanks for trying to help me.

 

Is any PC User here experiencing this same problem as well?