Can I stop sharing my live location without making it a family argument?

My sister messaged, “Why are you still at the shopping centre? You said you'd left.” I was waiting for a friend outside. We started sharing live locations during a holiday last year and never discussed stopping.

I like sharing a trip when somebody is meeting me. I dislike finding that an ordinary pause now needs an explanation. My sister says checking the map saves her from bothering me with messages.

Is it unreasonable to turn the ongoing sharing off and offer it for agreed journeys instead? I want less commentary about my afternoons, not less contact with her.