Sound of engine while changing camera

[Youtch]

I just noticed that when you switch to enemy or allied plane camera, and then change the different camera types to see the plane from different view points/angles, you stop hearing the engine correctly  as if it was very afar or in slowmo.

 

The engine sound works fine when looking external camera to allied/enemy plane or when using different view points camera on own plane.

 

I believe it is a bug.