That is impossible. Yamato had the handcuffs on BEFORE eating the fruit, yet Kaido's men were able to recognize her on sight in full zoan form. This means that they had seen Yamato before.
If sea stone doesn't stop you from using Haki, since she fought ace, or using your DF powers, can it really be called sea stone? The voivre card was simply wrong on that point, and mistakes happen in ever manga volume so for the moron who's going to say "mistakes mean not canon", Zoro vs Killer is non canon because that fight has mistakes.