Out flying early morning the other day over estuary waters. Takeoff was normal but forward speed in normal mode chronically slow[thought at first I was in cine mode] but no def. in normal mode. Switched to sport mode and it behaved as it should,went back into cine mode,speed commensurate with that mode. Back into normal mode and the drone reverted to snail pace again. Can anyone suggest a solution to the problem. Have had no issues with my air 2 until now. Drone is about 12 months old but only flown maybe twice a week. Thanks for any input.