The pocket on the bottom right is the ebs part of the helix. When you let off the gas the rollers slide down the ramp. Around 5mph, they kick back into that pocket and keep the secondary closed to assist engine breaking.
So when you come to a stop, the rollers are resting in that pocket. When you hit the gas to get going again, the rollers have to jump forward to the ramp. That, coupled with strait cut gears in the trans....make the rollers jump to the ramp quite abruptly. The pop your hearing specifically is the rollers making that jump to start climbing the ramps.
Lower more gradual engagement will let you ease into the throttle and quite it down some.