Yes, I have the same clunk, sometimes it's a clunk, then a slight rattle that will follow. Only notice at low rpm while in 1st, usually while cruising a parking lot.
It's very annoying. Was going to take it back to dealer if I get some time this next week. I hope that there is a solution. I posted elsewhere and someone mentioned it could be driveline lash or drivetrain lash.
Braden