I just took my daughter to the dentist and brought this up they said it was normal them getting used to their teeth or using it to soothe and won’t affect their teeth it just sounds so loud and ugly tho I try to give her a teething toy or something else to put in her mouth thankfully she hasn’t done it much now that the two teeth have almost fully come in
My baby done the same thing. I don't think you can do anything to stop it. It is just new sensations for her ☺️