It will struggle to control the boost when the target boost and duty settings aren't right.

Turn all the learning functions off, run the car with the controller turned [OFF] and establish what boost it will make on the actuator.

Then turn it onto [A] and work your way up. Set the target boost to, say, 1.00kg/cm and the duty to 30, then adjust the duty until you get around 1.00kg/cm.

See how you go with that.