DJI UAV has 8 grids of gps, but it still can't refresh navigation points.

Refreshing the return point fails. Generally, there are two situations:

1. Failed to manually set the return point, indicating that the GPS signal of the remote controller is weak, because the GPS signal of the mobile phone is too weak to meet the requirement of setting the current position of the mobile phone as the home point. The dot indicates the current position of the mobile phone, and the red dot indicates that the signal is weak. It can only be set if it becomes a blue dot. Suggest trying again in another environment;

2. When the position of the last return point and the position of the return point to be set do not change much (it should be less than 5 meters), the return point cannot be set.

If the refresh of the return point fails, please confirm the current position of the return point and use automatic return carefully.