I bought a Bayangtoys x21 drone which works great apart from this one flaw; on the transmitter, the distance, height, speed, compass direction, drone battery level and satellite connection aren't showing up or sometimes show up but have a huge latency. Someone suggested that a GPS module may be at fault but follow me and point of interest both work. Could there be an issue with the drone sending the data back to the drone? I have contacted Banggood and am waiting for a reply. Any help appreciated.