458 spider suspension with rolling dice cup feeling over bumps

Hi - I own a 458 spider. When I drive in 40-50 km/h over bumpy roads, I sense the feeling and sound of rolling dices in a dice cup. It also feels like something is loosen. However, if I change to "race" model, this sound or feeling is gone.

Does anyone have any ideas what is wrong? Seems like an issue with the suspension?

Thank you.