Joystick query

Hello, I am facing a major issue, while I fly my quadcopter in position mode, once i leave my joystick , it returns to the centre default solution automatically at the same time the drone is also coming down with the joystick. I am using Logitech F310. With QGC version 4.4.3 Sometimes the stick inputs are also neglected and delay are also observed. If anyone could help me with this it would be amazing.

@rroche @JulianOes