Today I tried with 2 identical Phantom 4 Pro drones to fly a 2D grid. (200m x 20m width), 20m height and 2m/s. When the drone reach the end of the first path it nicely moves to the second path of the grid and when it start flying in that path it won’t stick to the 2,0m/s. It starts flying at 10m/s. The app shows no errors. It’s still in mission. No return to home or anything, just speeding like crazy. Both the drones had the same issue. I tried it on to different iphones. The dji go app was not running. Software and firmware were up to date.
Any ideas what goes wrong?