​Root Cause: 

Excessive GPS signal discrepancy between primary and secondary antennas.

​Troubleshooting Steps:

（1）Check for obstructions or indoor environments.
​Note: Bridge underpasses are prohibited for operations (GPS signal loss may cause drone deviation and crash).

（2）Replace the positioning module.

（3）If unresolved, the flight controller's software cable may be disconnected; replace the flight controller.