Accelerate dropouts

Hello I have a 2021er 2.0 tdi 200 ps tarraco and the following problem. If I have a normal acceleration the car deceleration as if I was giving the gas to press the clutch stupidly expressed so it is quick to inflate and off and that causes a strong jerk. This especially occurs during uphill rides. Error I have read nothing no entry. A second question would be normal that the car in empty run between 12.3 and 12.6 volt, while driving 13.3 volt and braking 14 .6 volt has? Thank you for your help