I think the confusion here is that NCL website always gave you the choice to pick a cabin at a higher price or choose the cheaper "Guarantee". Now there is no choice.
You only see the guarantee and not given the option to pay more to choose a cabin. I'm having this problem for the June 24, 2023 Getaway sailing. They only let you select a family club balcony room (don't want the bathtub) but not a regular club balcony room.