At 1:38:20 on the rewind video we see Anna in 3rd palce only 100m from the finish...pulling up to weather on 2nd palce AUS...suddenly AUS performs a gybe, then immediately tack...giving up 2nd as Anna passes and also China passes...so AUS lost 2 spots. Why did she gybe out? Boats looked too separated to be some kind of foul...Aus was in a position to luff Anna to protect her lead.

What gives?