Hi..i have an iphone 11 pro and yesterday when i was cleaning the phone i noticed a piece of paper(or something like that) between the stainless steel and back glass ( where i have circled in the photo)...i am sure that it is from the factory, maybe when the phone was making, but i want to know if someone else has noticed something like that on his iphone and if it will make me any damage...thank you for your help and i wish health to all