You are probably saying this because the little signal icon on the display shows full bars. As I mentioned in my previous post, the issue is the result of latency of the signal in Virtual Stick drones. Unlike drones with native waypoints (drones that allow the entire mission to be loaded into the drone), VSC drones require flight commands and positional feedback be continuously transmitted between the drone and controller as the flight progresses. The slightest signal latency is observed as un-smooth movements in the drone.
This video describes the issue and remedies: