I have the original Phantom 4 and it flies perfectly normal, as it should. Today I flew my Phantom 4 Pro, and I couldn't believe what happened. In P mode, I was consistently hitting speeds around 45 miles per hour (MPH, not KPH). In Sport mode, I was consistently reaching speeds of 72 MPH!!! It looked like a racing quad. Obviously, both modes' speeds were much higher than they should have been. And yes, the units of measure in the app are set to imperial, not metric. I am a photographer, so this kind of performance is a hindrance to my work. Has anyone else heard of this issue? Mine is obviously going back tomorrow. See the attached photo of the flight log to see proof of top speed.