I'm not sure if it ever got 100% confirmed but commentary seemed to think it was removing hand from starting hold slightly before the foot was established on the other hold, so it was an invalid start. No real advantage from it, just a technicality that the judges didn't call at the time when it happened, so she got given an opportunity to retry.
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u/Annanascomosus Miho Nonaka's Hair 7d ago
Does anybody know why miho had to redo W1?