error gallery post

Hello, I get the error does not show in the gallery interface amp. Specifically it only shows only one time with the first gallery, also from gallery 2 it does not show. If I delete the gallery 1 gallery 2 will be displayed.
ex: https://nhipsongso.net/amp/danh-gia-xe-hyundai-i20-active-hatchback-2017-xe-thanh-thi-thoi-trang-nho-gon/ (show gallery 1)
https://nhipsongso.net/danh-gia-xe-hyundai-elantra-2017-mau-xe-hang-c-tre-trung-tien-nghi-linh-hoat/ (not displayed)