Guys, I just recently bought Hawkeye by Fraction omnibus and before reading it watched few vids like "How to properly open Marvel Omnibus". After flipping some pages I noticed that brown lining came apart from binding.
Here the questions: should I worry about it ? Is my omnibus damaged ?

Here some pictures of it:

https://imgur.com/RSN1Utf

https://imgur.com/u3a2rC0

For example, this is how the binding with brown lining looks like in my "Spider Man: Tangled Web" omnibus:

https://imgur.com/HXJfKMA

https://imgur.com/pRVhkh4