An Instacart total can change because the basket becomes easier to read than most shoppers expect.
If an Instacart total feels different after you compare stores, come back later, or tweak the cart, the answer is not always one obvious fee. Grocery-delivery flows can react to repeat visits, basket history, location context, urgency, and account continuity in ways that make the session feel more recognizable and more pressure-heavy.
If you searched because a grocery-delivery total suddenly felt different, start with the current controlled demo first. It shows one real proof path without pretending Cloak already has a fully public grocery-specific artifact.