FPS Walker Enhanced popping up in the air

Hey there
I've tried to implement an FPSWalkerEnhanced in my learning project. However, whenever I start the game, the player floats a little bit over the plane. When I move, it's correctly sliding across the plane, but whenever I stop again, it floats at a fixed height from the plane. When it's moving, the height is about 10, but when stopped, it's always 17.2050. Moving either object didn't make a difference. I'm using an FPSWalkerEnhanced and this camera script. Thank you for your time
ekliptik