Not just that, but when giving the buzzer as a conductor, I'd hope that power wasn't millisecond perfect.
On Wcml over shap that’s already been implemented on the 87 (w mk3 coaches), class 101, and on stock with no buzzer the guard/conductor blows his whistle when all doors close. It’s also been on black pool branches too (except 101 layers form tees valley line)
They should add this if they want to improve conductor/guard mode. It does kill the immersion on the TSW British routes where the Driver/Engineer leaves the station after the Guard/Conductor buzzes. It does make sense for the engineer to depart from the station after the conductor buzzes the engineer on routes based in the US.