Babies and wine cork

I am reading mixed answers on whether or not it’s okay for a baby to chew on wine cork. I personally think no, especially now that my child has long, sharp front teeth so he can easily scrap pieces of the cork off. But I’m not sure anymore just cause my MIL was giving me dirty looks when I asked her to not give the cork to my son and she kept telling me it’s fine and gave it to him until my FIL eventually took it away.