'Oumuamua Livestream

The interstellar object 'Oumuamua is speeding out of the solar system at thirty miles-per-second. It has been designated a natural object from deep space, but recently it has been announced that it is accelerating. How is this possible if it is a natural object?
See here for the previous livestream: http://hpanwo-tv.blogspot.com/2018/06/space-force-livestream.html.
See here for background: https://hpanwo-tv.blogspot.com/2018/02/seti-and-ufos.html.