Our driver app suddenly loses its GPS lock whenever a vehicle is in motion through busy city streets. While sitting still everything looks perfect, the moment the driver starts rolling the map pauses, location markers disappear and the platform shows the car offline until the signal randomly returns. This glitch only happens in dense urban areas; highways and open roads behave just fine. I need you to dive into the real-time tracking layer—device-side code, server parsing, or both—and eliminate these motion-based dropouts. Whether the solution calls for filtering out noisy satellite data, tightening sensor-fusion thresholds, switching to fused-location services, or redesigning the websocket update cycle, I’m open to the cleanest, most reliable fix. Acceptance criteria • A 30-minute continuous city-drive test must stream uninterrupted positions at the current update interval. • No dead-spots or “ghost jumps” greater than 10 m should appear on the live map. • Changes must be documented so future builds keep the same stability. If you’ve solved similar urban GPS headaches on Android or iOS before and can back it up with code, diagnostics and a clear test plan, let’s get started right away.