This new piece is called Bawn

https://preview.redd.it/nbl5ne52u6ag1.png?width=2557&format=png&auto=webp&s=02bf5b99ded51ebf931d8cd62711fd65f8f7aa40

I cant necessarily say this is a chess.com bug, it maybe a browser bug as well considering I am playing on Arc browser from Browser company.