Good afternoon. thank you for the answer.
I'm sending you a video so you can view my terrarium.
I would say that there are some things that can be abrasive, like logs. but nothing she didn't find in nature.
I also believe it was "injured" by abrasion. I will keep an eye on any other signs.

https://youtube.com/shorts/pFWfOuj2MZU?feature=share