Unity3d, when I restart server ,can not control drone,cause drone is moving at an incredible speed。

[mcaisw]

When the scene is loaded, I start PInvoke.StartServer, and when the scene is unloaded, PInvoke.StopServer is called,but when I load the scene again,can not take off the drone,cause the drone is moving at an incredible speed,even 7 million m/s .