Dear Jet-Pack (IPACS)
As you must know, on mobile, to use the AUTO BRAKE, you have to wait the AUTO BRAKE light ON (2s MED / 4s LO) before using the slide at 50% brakes (100% brakes cancels AUTO BRAKE). But, if you brake before the AUTO BRAKE light is ON, AUTO BRAKE is cancelled. Braking cancels AUTO BRAKE like when braking with a car cancels speed regulator (it's normal).
How about, in the case of an AUTO BRAKE settings is set, to make possible to use throttle/brake slider to 100% braking, which only launch reverse, then AUTO BRAKE is activated (2s LO / 4s MED later) like it has to be. When releasing the brakes/throttle slider, back to normal, if you use brakes it cancels AUTO BRAKE?