I’ve experienced a DCT with e-break and hill assist that stops the hill holder when pressing the accelerator even though the torque generated is not yet enough to actually keep the car from rolling back. This same car has a very twitchy accelator where, while on a hill it will not really react to pressing the accelerator until a certain tiny threshold is reached, at which point in shoots forward aggressively if you overshot the threshold.
As a result, on a hill while releasing the break, the car stays put, touching the accelerator gently to find the threshold will have you roll back hitting the car behind and pressing the accelerator harder to avoid this will have you lurch forward hitting the car in front. It’s never been a problem in traffic because you have time to react to these weird behaviours, but between very tightly parked cars, it is a nightmare.