Just want to report a sound issue I have with the MBTA stock. I have noticed that if you enter the front door on the first passenger car directly behind the locomotive the locomotive sound is completely gone, despite the door being open and the loco being directly in front of you. This is sort of an immersion killing bug, as surely the sound proofing isn't so good on the cars that it stops the sound coming in open doors. I am sure there is a technical reason why it does this, but it just seems lazy to someone playing the game who notices it.