i think that is happening to me too. I assume this because I weigh slightly less after 3 weeks, yet my bf% (tantia reading) remains the same.
I think my body is used to have low carbs, even before I started ckd, which may account for the lack of weight/bf% loss.
After 3 weeks and 2 carb-ups ( i missed a week carb-up) my abs are more visible and I have no bloating at all (unless I drink diet sodas).
My strength at the gym is definetly reduced except for 1st day post carb-up.