While the drone is under GPS mode, its default mode is Beginner Mode.

Which limits the flight range:
Maximum Flight Distance is 30 meters
Maximum Flight Altitude is 30 meters
RTH Altitude is 20 meters

Note: The drone will not be able to fly over the range set by the APP. If it flies over the set altitude or distance, the drone will automatically fly back.

Follow the below picture to turn off the BeginnerMode and set the proper flight setting in the app

1) Connecting to the drone's WiFi,
2) Enter the drone's APP
3) Click to turn off the beginner mode in the APP settings
4) Increase the flight altitude and flight distance
5) Save

Please note: this process must be connected to the WiFi of the drone, otherwise the settings cannot be saved.