it has a default mode so defaults to follow me mode upon restart.
I personally think that this makes sense as when a pilot starts up and begins initial flight you really want regular pov from the camera. you then get oriented, line up your shot and set the camera settings and gimbal mode for that element of your flight.
Free mode is only really useful when your filming something specific and dont want the yaw of the inspire to alter the framing.
Most of us have C1 or C2 set to return the camera to centre for orientation POV purposes.
I for one am ok with it defaulting even though I fly free mode most of the time.