I had put the vehicle into One Pedal Drive mode for the first time on the morning of Aug 29th. Vehicle operated as it should for first few places I drove to and stopped, but then I approached a red light, removed foot slowly from accelerator and vehicle came to a full stop as it should. Approximately 2-5 seconds later, without warning or even the collision avoidance system activating, my vehicle suddenly accelerated into the rear of the stopped truck in front of me. Fortunately no serious injuries but someone could have been killed. My foot was NOT on the accelerator at the time - it was hovering over it while waiting for the light to change to green. My vehicle was taken to Ford for evaluation, but they claim it has to be repaired before they can diagnose/confirm the issue. I am the original owner with no previous accidents or incidents.