yes, i understand that, in sport mode maybe the drone or firmware it is not calibrated ok, but in c, indoor, in p, everywhere, no wind, with wind, every conditions...i am full of that error, for the moment the drone had a crash and it is in service, i will see when they changed if it continues this errorMaybe there is something with your drone, I can fly C mode all day long and will not get those messages, but if I will use S against the wind it will eventually give me a warning.