Quick Fix: Google Maps Marker Not Updating in React Native App

We have a working React Native screen with a Google Map. The user's location marker renders on first load but doesn't move as the device location changes. Everything else on the screen works fine. This is a small, self-contained task — should take 30–45 minutes for someone who knows react-native-maps. What we need: Diagnose why the marker isn't re-rendering on location updates Fix it so the marker follows live position smoothly Confirm it works on both iOS and Android Requirements: experience with react-native-maps and React Native geolocation. Please reply with one sentence on the most likely cause based on the description above.