Cardi B posted, and subsequently deleted, a video defending a foot-in-mouth moment at Monday’s Met Gala. All eyes were on the rapper as she made her way up the stairs in a giant black gown by designer Sensen Lii of Windowsen, but when it was time to tell everyone who’s fashion she was wearing, Cardi blanked. Instead of saying she forgot, the Up artist referred to Lii as “this amazing designer” who is “Asian and everything”, a move that made more than a few fashionistas cringe. One particular critic was Vogue’s former managing editor Gilbert Cheah, who remarked on Cardi’s flub in an Instagram comment. “For the record and recognition, and no thanks to Cardi B, the designer of her gown is Sensen Lii who’s Chinese,” Cheah said of the sprawling ebony design, which needed seven assistants to carry and unfurl. “The gown took two months to make,” the fashion editor noted. Ending with a dig, he said: “I personally think it’s boring and not even on theme but she chose it and should have …