I have a 2021 F-150 Powerboost and last week I was driving, came to a complete stop and as I was stopped, it felt like someone hit me from behind, but that wasn't the case. What it feels and sounds like is that it is either changing gears or the driveshaft is engaging after I have been driving while am at a complete stop. This happens anywhere from 5-30 seconds after stopping and not after I stop each time. There aren't any recalls about this and the earliest I can get it looked it is Oct 4. Anyone else having this issue or heard of it?

 

Being a 2021 and having a potentially dangerous condition, I would have your dealer's service department take a look at that.