If Shinobu asked Yamato to go after a place for them to hide, why would Yamato go after a floor that has a bunch of noise going on from the fighting between Nami, Usopp, Tama, Gifters, Ulti, Page One, Franky and Sasaki? makes no sense. It also makes no sense for her to go into conflict straight up, when her current mission is to find a place to hide for Momo and Shinobu.