What is the source for the above statement? There is no information in the current B738M AOM that tells crews that the "MCAS cycles between the left AoA and the right AoA sensor".
I **suspect** ther confusion comes from a much earlier post- probably re lion/maintenance comments that as I ***vaguely *** recall - there is an automatic change/switch of right side to left side computer systems/ TO displays every flight cycle or similar.