I have a little HS 120D and mine does the same. I just leave it for a couple of minutes until it acquires the right number of satellites for GPS and then the lights show accurately for take-off procedure.
Hi, not long have I taken up this hobby and like all newcomers I suppose, I am here in the first instance to gain more knowledge about flying drones.
As I gain more experience maybe I can contribute to the forum info and ideas.