2016 noise from rear suspension

Developed a loud occasional knock noise from the right rear of the car.
Seems to be after the suspension has been compressed, and is rebounding.
Doesn’t happen all the time , but when running hard in the woops I might hear the noise a couple times a minute.
Can’t see any obvious causes after visual inspection of the shocks,or sway bar area.
Car is a 2016 xp4 with less that 20 hours on it.

Any ideas?

Stumped in So Cal…….