This kind of thing comes up now and then. The exact same problem hit me on two separate occasions with that item.
Been using a low amount for four weeks then a bit more for three. This week the scale showed a pound higher even with daily workouts and keeping food intake controlled. Since early August the net is up a pound when the math said five pounds should have come off. Worried maybe calories are too low but that still shouldn't cause an increase. Finishing the current level and hoping things move after vacation with more restaurant meals. Aiming for slow steady change but dislike seeing the number rise, though it's likely just fluid or digestion. Not raising it now since hunger is already way down and don't want to spoil the trip with my daughters.