Rock rattle sound on take off after being parked

This is likely a waste of everyones time, the old "what's this odd sound" thread, but figured I'd give it a shot. 2018 prius with 42K or so. This weekend, after parking (it only does this once at initial take off) I'm hearing a 2 second sound similar rocks or a stick in your wheel, however nothing is in my wheels that I can see.

Anyone familiar with this by chance?

Park in my driveway, reverse, put in drive, and then before I leave my street i hear it. Then its gone for the remainder of that trip, and will come back once car is parked again and then put in drive.

No other symptoms or signs of trouble.

 

Yes i will get a recording, as it happens every time. I hung my head out the window, door open, etc, was harder to hear it that way.

The constants:
Happens only once, after coming to stop or reverse, and then going forward again. happens at 10-12mph
Seems to be coming from under me, so front driver wheel//axle area.

very annoying now that i cant unhear it.
Need to roll down a hill in neutral and see if it does it

will be back with audio