The people who know your habits should remain curious about your reasons.

People who know you well can slip into predicting instead of asking. Your habits are visible, so your reasons look known, and the conversation moves to what you will probably do rather than to why you might. Meanwhile you have been changing quietly, as everyone does, and the version being addressed is a few years old.

Ask the people you know best a question you assume you could answer for them, and let the reply surprise you. Say when your own reasons have shifted instead of expecting someone to notice. Familiarity is a starting point rather than a finished description.