Rider all over the place

my rider after the climb bit coming into the sprint zone seems
Like something wrong. For about 10 seconds my rider basically lies
Down and moves from side to side on the screen and then about the 150
Meter mark it is back upright. Does it when I am in excess of 235 watts

internet issues ? - I don’t know about your particular issue but my understanding is those odd riders you occasionally see spinning about are having server connection problems