Physics slower after pause

I have a simple scene with a sphere rolling down a long plane. I have it set where a tap on the screen pauses physics and the next tap resumes physics using sio2PhysicPlay and sio2PhysicPause. Everything works fine except when resuming from a pause the ball is moving slower than it was before the pause. Is physics and the ball loses all its velocity when you pause or do you think I am missing a line somewhere that will fix this? Any advice