Steam Class 801 Diesel Engine Plays In Ai Mode, Even Though It Isn't Suppose To

I have already filled a ticket on this over on DTG support (and talked about it on another post), but I want to bring up here, just to see how people feel about this. I may not have any video evidence of this, but hopefully this description should give a good idea on what I'm talking about (Maybe someone will provide video evidence in response, who knows?).

Now I'm aware that despite being a pure electric-multiple-unit, the Class 801 has a diesel engine under each carriage that is only supposed to be used in case of emergency, and apparently, it has been done up and is useable in the version that comes with the new East Coast Main Line route in TSW4.

However, when this unit is operating under AI, it seems to play regardless of whether it's suppose to or not. In most cases, it's usually not suppose to, as the top speed under this mode is usually no more than 5 mph. This sound under AI can usually be heard in the front two/three coaches of the unit, DPTS & MS (applies to both the 5 & 9 car variants of the unit).

I do find this issue to be an immersion breaker, as that sound doesn't normally play in regular operations. Luckily this sound only plays in these carriages and the rest play the normal sounds an 801 would play in regular service, so hopefully, these front cars can have their AI audio adjusted so it can be more like how they would usually operate without the diesel engine turned on.