2015 570sp power steering problem

I have been having problems with my PS since day one. Took it to the dealer and they are going to look at it this afternoon. Service manager took it for a drive and said in 2 wheel drive it works great. He claims in 4 wheel mode that with the front wheels pulling that it tightens up and steers harder. That doesn’t sound right to me. Doesn’t Polaris only go into 4 wheel when it senses loss of trackion? Could some of you comment on this.