If it happens right when you launch after starting the motors, it is normal.
When I fly my Spark, I turn it ON, let it sit and collect the GPS info and wait for the status bar to go green before starting the motors.
Sometimes you'll hear a Home Point update after it collected the information and then again at launch.
If you use a device that has GPS, I believe you can update your Home Point as you move about with the controller or set it for auto update?.
I have WiFi only so haven't tried it yet myself.